Operation Iraqi Freedom succeeded in overthrowing Saddam Hussein, but Iraq remains unstable because of Sunni Arab resentment and a related insurgency, now compounded by Sunni-Shiite violence that some believe is a civil war. This report discusses the background of the issue and examines several security challenges, response, and other policy options for the U.S.

This report addresses defense transformation from a DOD-wide perspective. The Bush Administration identified transformation as a major goal for the Department of Defense (DOD) soon after taking office and has since worked to refine and implement its plans for defense transformation. Defense transformation can be defined as large-scale, discontinuous, and possibly disruptive changes in military weapons, concepts of operations (i.e., approaches to warfighting) and organization. The issue for the 109th Congress is how to take the concept of defense transformation into account in assessing and acting on Administration proposals for DOD.

Restrictions on travel to Cuba have been a key and often contentious component in U.S. efforts to isolate the communist government of Fidel Castro for much of the past 40 years. Under the Bush Administration, enforcement of U.S. restrictions on Cuba travel has increased, and restrictions on travel and on private remittances to Cuba have been tightened. Several legislative initiatives have been introduced in the 109th Congress that would ease restrictions on travel and remittances to Cuba. These bills would, among other things, lift overall restrictions on travel to Cuba, lift the overall embargo, and ease restrictions on exporting agricultural commodities to Cuba.

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Operation Iraqi Freedom succeeded in overthrowing Saddam Hussein, but Iraq remains unstable because of Sunni Arab resentment and a related insurgency, now compounded by Sunni-Shiite violence that some believe is a civil war. According to its November 30, 2005, “Strategy for Victory,” the Bush Administration indicates that U.S. forces will remain in Iraq until the country is able to provide for its own security. This report discusses security challenges, responses, and policy options.

This report addresses defense transformation from a DOD-wide perspective. The Bush Administration identified transformation as a major goal for the Department of Defense (DOD) soon after taking office and has since worked to refine and implement its plans for defense transformation. Defense transformation can be defined as large-scale, discontinuous, and possibly disruptive changes in military weapons, concepts of operations (i.e., approaches to warfighting) and organization. The issue for the 109th Congress is how to take the concept of defense transformation into account in assessing and acting on Administration proposals for DOD.

Restrictions on travel to Cuba have been a key and often contentious component in U.S. efforts to isolate the communist government of Fidel Castro for much of the past 40 years. Under the Bush Administration, enforcement of U.S. restrictions on Cuba travel has increased, and restrictions on travel and on private remittances to Cuba have been tightened. Several legislative initiatives have been introduced in the 109th Congress that would ease restrictions on travel and remittances to Cuba. These bills would, among other things, lift overall restrictions on travel to Cuba, lift the overall embargo, and ease restrictions on exporting agricultural commodities to Cuba.

Restrictions on travel to Cuba have been a key and often contentious component in U.S. efforts to isolate the communist government of Fidel Castro for much of the past 40 years. Under the Bush Administration, enforcement of U.S. restrictions on Cuba travel has increased, and restrictions on travel and on private remittances to Cuba have been tightened. Several legislative initiatives have been introduced in the 109th Congress that would ease restrictions on travel and remittances to Cuba. These bills would, among other things, lift overall restrictions on travel to Cuba, lift the overall embargo, and ease restrictions on exporting agricultural commodities to Cuba.

Operation Iraqi Freedom succeeded in overthrowing Saddam Hussein, but Iraq remains unstable because of Sunni Arab resentment and a related insurgency, now compounded by Sunni-Shiite violence that some believe is a civil war. According to its November 30, 2005, "Strategy for Victory," the Bush Administration indicates that U.S. forces will remain in Iraq until the country is able to provide for its own security. Mounting U.S. casualties and financial costs -- without clear signs of security progress -- have intensified a debate within the United States over the wisdom of the invasion and whether to wind down U.S. involvement without completely accomplishing U.S. goals.

The Bush Administration identified transformation as a major goal for the Department of Defense (DOD) soon after taking office, and has justified many of its initiatives for DOD in connection with the concept. Defense transformations can be defined as large-scale, discontinuous, and possibly disruptive changes in military weapons, concepts of operations (i.e., approaches to warfighting), and organization. The issue for Congress is how to take the concept of defense transformation into account in assessing and acting on Administration proposals for DOD. Potential areas of debate regarding the Administration's strategy for implementing transformation include overall leadership and management; the balance of funding for transformation vs. near-term priorities; the roles of DOD offices responsible for transformation; tests, exercises, and metrics for transformation; independent analysis of the Administration's plans; and actions for creating a culture of innovation.

A letter report issued by the Government Accountability Office with an abstract that begins "The Federal Reserve System's Federal Reserve Banks (FRB) serve as fiscal agents of the U.S. government when they are directed to do so by the Secretary of the Treasury. In this capacity, the FRBs operate and maintain several mainframe and distributed-based systems--including the systems that support the Department of the Treasury's auctions of marketable securities--on behalf of the department's Bureau of the Public Debt (BPD). Effective security controls over these systems are essential to ensure that sensitive and financial information is adequately protected from inadvertent or deliberate misuse, disclosure, or destruction. In support of its audit of BPD's fiscal year 2005 Schedule of Federal Debt, GAO assessed the effectiveness of information system controls in protecting financial and sensitive auction information on key mainframe and distributed-based systems that the FRBs maintain and operate for BPD. To do this, GAO observed and tested FRBs' security controls."

A letter report issued by the Government Accountability Office with an abstract that begins "The Centers for Medicare & Medicaid Services (CMS), a component within the Department of Health and Human Services (HHS), is responsible for overseeing the Medicare and Medicaid programs--the nation's largest health insurance programs--which benefit about one in every four Americans. CMS relies on a contractor-owned and operated network to facilitate communication and data transmission among CMS business related entities. Effective information security controls are essential to protecting the confidentiality, integrity, and availability of this sensitive information. At Congress's request, GAO assessed the effectiveness of information security controls over the communication network used by CMS by conducting a technical assessment of the information security controls that are currently in place."

A letter report issued by the Government Accountability Office with an abstract that begins "The Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (SAFETEA-LU) authorized about $7.9 billion in commitment authority, through fiscal year 2009, for the Federal Transit Administration's (FTA) New Starts program, which is used to select fixed guideway transit projects, such as rail and trolley projects, and to award full funding grant agreements (FFGAs). The New Starts program serves as an important source of federal funding for the design and construction of transit projects throughout the country. SAFETEA-LU requires GAO to report each year on FTA's New Starts process. As such, GAO examined (1) the number of projects that were evaluated, rated, and proposed for FFGAs for the fiscal year 2007 evaluation cycle and the proposed funding commitments for the fiscal year 2007 budget; (2) procedural changes that FTA proposed for the New Starts program beginning with the fiscal year 2008 evaluation cycle; and (3) changes SAFETEA-LU made to the New Starts program and FTA's implementation of these changes. GAO reviewed New Starts documents and interviewed FTA officials and project sponsors, among other things, as part of its review. GAO is not making recommendations …

This report examines characteristics of both the insured and the uninsured people.

This report provides Emergency an Overview and Options for Congress on Emergency Management Preparedness Standards which includes major recommendations like adoption and use of emergency response standards, mutual aid provisions, private sector preparedness.

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This report provides an overview of the complexities of the Copyright Act's provisions concerning music licensing in the digital age.

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Much higher than expected receipts reduced the estimated deficits for fiscal year 2006 in both the Administrations Mid-session review and in the Congressional Budget Office's The Budget and Economic Outlook: An Update. These were over $100 billion below the Administration's previous estimate and $70 billion below the Congressional Budget Office's previous baseline estimate. This report contains information on the background and analysis for the federal budget in the fiscal year 2006, the financial situation at that time, budgeting tools, budgetary actions, outlays, receipts, deficits, and related materials.

The Large Synoptic Survey Telescope (LSST), a ground-based telescope currently under development, will allow a thorough study of dark energy by measuring, more completely and accurately than previously, the rate of expansion of the universe and the large-scale structure of the matter in it. The telescope utilizes a broadband photometric system of six wavelength bands to measure the redshifts of distant objects. The earth's atmosphere makes it difficult to acquire accurate data, since some of the light passing through the atmosphere is scattered or absorbed due to Rayleigh scattering, molecular absorption, and aerosol scattering. Changes in the atmospheric extinction distribution due to each of these three processes were simulated by altering the parameters of a sample atmospheric distribution. Spectral energy distributions of standard stars were used to simulate data acquired by the telescope. The effects of changes in the atmospheric parameters on the photon flux measurements through each wavelength band were observed in order to determine which atmospheric conditions must be monitored most closely to achieve the desired 1% uncertainty on flux values. It was found that changes in the Rayleigh scattering parameter produced the most significant variations in the data; therefore, the molecular volume density (pressure) must be measured …

The Resistive Plate Chambers (RPCs) initially installed in the Instrumented Flux Return (IFR) of the BABAR particle detector have proven unreliable and inefficient for detecting muons and neutral hadrons. In the summer of 2004, the BABAR Collaboration began replacing the RPCs with Limited Streamer Tubes (LSTs). LST operation requires a mixture of very pure gases and an operating voltage of 5500 V to achieve maximum efficiency. In the past, the gas supplies obtained by the BABAR Collaboration have contained contaminants that caused the efficiency of the IFR LSTs to drop from approximately 90% to approximately 60%. Therefore, it was necessary to develop a method for testing this gas for contaminants. An LST test system was designed and built using two existing LSTs, one placed 1 cm above the other. These LSTs detect cosmic muons in place of particles created during the BABAR experiment. The effect of gas contamination was mimicked by reducing the operating voltage of the test system in order to lower the detection efficiency. When contaminated gas was simulated, the coincidence rate and the percent coincidence between the LSTs in the test system dropped off significantly, demonstrating that test system can be used as an indicator of gas …

The International Linear Collider (ILC) is a proposed electron-positron collider, expected to provide insight into important questions in particle physics. A part of the global R&D effort for the ILC is the design of its electron gun and electron bunching system. The present design of the bunching system has two sub-harmonic bunchers, one operating at 108 MHz and one at 433MHz, and two 5-cell 1.3 GHz (L-band) bunchers. This bunching system has previously been simulated using the Phase and Radial Motion in Electron Linear Accelerators (PARMELA) software, and those simulations indicated that the design provides sufficient bunching and acceleration. Due to the complicated dynamics governing the electrons in the bunching system we decided to verify and expand the PARMELA results using the more recent and independent simulation software General Particle Tracer (GPT). GPT tracks the motion and interactions of a set of macro particles, each of which represent a number of electrons, and provides a variety of analysis capabilities. To provide initial conditions for the macro particles, a method was developed for deriving the initial conditions from detailed simulations of particle trajectories in the electron gun. These simulations were performed using the Egun software. For realistic simulation of the L-band …

In several past studies, model independent analysis, in conjunction with a virtual accelerator model, has been successful in improving PEP-II linear geometric optics. In many cases, optics improvement yielded an increase in machine luminosity. In this study, an updated characterization of linear optics is presented. With the PEP-II beam position monitor (BPM) system, four independent beam centroid orbits were extracted and used to determine phase advances and linear Green's functions among BPM locations. A magnetic lattice model was then constructed with a singular value decomposition-enhanced least-square fitting of phase advances and Green's functions, which are functions of quadrupole strengths, sextupole feed-downs, as well as BPM errors, to the corresponding measured quantities. The fitting process yielded a machine model that matched the measured linear optics of the real machine and was therefore deemed the virtual accelerator. High beta beat, as well as linear coupling, was observed in both LER and HER of the virtual accelerator. Since there was higher beta beating in LER, focus was shifted to the improvement of this ring. By adjusting select quadrupoles of the virtual LER and fitting the resulting beta functions and phase advances to those of the desired lattice, the average beta beat of the …