The majority of the world's Muslim population follows the Sunni branch of Islam, and approximately 10%-15% of all Muslims follow the Shiite (Shi'ite, Shi'a, Shia) branch. Shiite populations constitute a majority in Iran, Iraq, Bahrain, and Azerbaijan. Sunnis and Shiites share most basic religious tenets. However, their differences sometimes have been the basis for religious intolerance, political infighting, and sectarian violence. This report includes a historical background of the Sunni-Shiite split and discusses the differences in religious beliefs and practices between and within each Islamic sect as well as their similarities. The report also relates Sunni and Shiite religious beliefs to discussions of terrorism and sectarian violence that may be of interest to Congress.

Much of the debate over U.S. policy toward Iran has centered on the nature of the current regime; some believe that Iran, a country of about 70 million people, is a threat to U.S. interests because hardliners in Iran's regime dominate and set a policy direction intended to challenge U.S. influence and allies in the region. President George W. Bush, in his January 29, 2002, State of the Union message, labeled Iran part of an "axis of evil" along with Iraq and North Korea.

To address the challenges facing the U.S. intelligence community in the 21st century, congressional and executive branch initiatives have sought to improve coordination among the different agencies and to encourage better analysis. This report discusses these challenges and efforts the current and previous Administrations and Congresses have taken and are taking to address them. The report includes criticism of the intelligence community's efforts regarding Iraq, Iran, and other areas. Improved analysis remains a key goal in these discussions.

This report includes a historical background of the Sunni-Shiite split and discusses the differences in religious beliefs and practices between and within each Islamic sect as well as their similarities. The report also relates Sunni and Shiite religious beliefs to discussions of terrorism and sectarian violence that may be of interest during the 111th Congress.

This report provides background information on Iran's support to armed groups and Iranian political influence and specifically discusses the relationship between Iran and Iraq.

This report examines logistical support contracts for troop support services in Iraq and Afghanistan (for Afghanistan, beginning with LOGCAP IV) administered through the U.S. Army's Logistics Civil Augmentation Program (LOGCAP). LOGCAP is an initiative designed to manage the use of civilian contractors that perform services during times of war and other military mobilizations.

This report analyzes war funding for the Defense Department and tracks funding for USAID and VA Medical funding. Information on costs is useful to Congress to assess the FY2010 Supplemental for war costs for the Department of Defense (DOD) and State/USAID, FY2011 war requests, conduct oversight of past war costs, and consider the longer-term costs implications of the buildup of troops in Afghanistan and potential problems in the withdrawal of U.S. troops from Iraq.

This report provides background information on Iran's support to armed groups and Iranian political influence. The report discusses the relationship between Iran and Iraq.