Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Oklahoma Historical Society Executive Director Bob Blackburn views a display of Oklahoma City memorabilia, including an original shopping cart and parking meter invented by city residents."

Photograph used for a newspaper owned by the Oklahoma Publishing Company.

The Atmospheric Release Advisory Capability (ARAC) is an operational emergency preparedness and response organization supported primarily by the Departments of Energy and Defense. ARAC can provide real-time assessments of atmospheric releases of radioactive materials at any location in the world. ARAC uses robust three-dimensional atmospheric transport and dispersion models, extensive geophysical and dose-factor databases, meteorological data-acquisition systems, and an experienced staff. Although it was originally conceived and developed as an emergency response and assessment service for nuclear accidents, the ARAC system has been adapted to also simulate non-radiological hazardous releases. For example, in 1991 ARAC responded to three major events: the oil fires in Kuwait, the eruption of Mt. Pinatubo in the Philippines, and the herbicide spill into the upper Sacramento River in California. ARAC`s operational simulation system, includes two three-dimensional finite-difference models: a diagnostic wind-field scheme, and a Lagrangian particle-in-cell transport and dispersion scheme. The meteorological component of ARAC`s real-time response system employs models using real-time data from all available stations near the accident site to generate a wind-field for input to the transport and dispersion model. Here we report on simulation studies of past and potential release sites to show that even in the absence of local meteorological …

Photograph used for a story in the Daily Oklahoman newspaper.

Photograph of a group of people standing outdoors near what appears to be a single-story structure. Two older men are walking towards a white car on the left, while others are heading towards a black truck closest to the house. Though mostly cropped out of the picture on the right side, the house is in different stages of repair. The roof and the walls have been covered with different construction underlayments, but the patio's entire wood framework can still be seen. In the distance, a few trees and telephone poles are visible.

Photograph of a single-story home taken a short distance away from the front door. The house has horizontal, white siding and dark shingles covering a gable roof. A wooden set of steps and railing leads to a single gray door on the right wall. There are no visible windows. In the distance, an empty plot of land and some trees can be seen. Accompanying information states this is the Hansen Shed, perhaps referring to the owner.

Photograph of a man and a woman standing outside next to a house. The woman, identified as Elsie Christensen, looks to her left while resting her right arm inside a window ledge. She wears a blue print top and a dark, pleated skirt. To her right, the man, identified as Pastor Fred Toerne, stands on the grass smiling at the camera. Accompanying information states they are at Pioneer House before repairs were made. The house appears to be a two-story structure. Door and window holes have been made, but no permanent structures have been installed. A small scaffold is in the background, a short distance away from Pastor Toerne.

Photograph of a group of older men and women standing outside of a two-story house. Although names have been provided through accompanying information, they have not been matched properly to the photograph. They stand in a line in front of a patio and a small scaffold. The patio is covered by a sloping roof surface supported by slender wooden columns. The left part of the house appears to be older than the right, judging by the aged look of the siding that covers that part of the house. The right side, on the other hand, looks to be an add-on to the house. Much of its walls have been covered by construction underlayment. The roofs, additionally, have been covered in tar paper.

Photograph of a group of older men and women standing outdoors in front of a two-story house. Although names have been provided by accompanying information, they have not been matched properly to the people in the picture. They stand in front of a small scaffold that touches the edge of a sloping roof that covers the patio. The overhang created by the roof is supported by two wooden columns. Construction underlayment covers the part of the house that is closest to them. The rest of the house, on the other hand, appears to be much older; the siding, for instance, looks aged and weathered. Tar paper covers intersecting gable roofs on all sides.

Photograph of an older man, identified as Carl Larsen standing outdoors in front of a two-story house. He wears a white shirt tucked into gray pants. The house behind him has two doorways, a roof covered by tar paper, and siding that looks aged and weathered. The man stands next to a sign with red lettering. It states, "Future home of Danevang Heritage Society Museum." An address appears to be listed in the bottom, but it is too small and the photograph too out-of-focus to be read with certainty.

Daily newspaper from Durant, Oklahoma that includes local, state, and national news along with advertising.

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.

Weekly student newspaper from McMurry University in Abilene, Texas that includes local, state and campus news along with advertising.

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.

Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.

Over the past decade, there has been extensive public concern about loss of forests around the world. Attention to the rapid rate of tropical deforestation accelerated during the late 1980's as concern about global climate change emerged; at the time, the extensive burning of forests in Brazil (and the consequent release of carbon dioxide into the atmosphere) was a major concern.

Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.

This report addresses safety guidelines for space nuclear reactor power missions and was prepared by The Johns Hopkins University Applied Physics Laboratory (JHU/APL) under a Department of Energy grant, DE-FG01-94NE32180 dated 27 September 1994. This grant was based on a proposal submitted by the JHU/APL in response to an {open_quotes}Invitation for Proposals Designed to Support Federal Agencies and Commercial Interests in Meeting Special Power and Propulsion Needs for Future Space Missions{close_quotes}. The United States has not launched a nuclear reactor since SNAP 10A in April 1965 although many Radioisotope Thermoelectric Generators (RTGs) have been launched. An RTG powered system is planned for launch as part of the Cassini mission to Saturn in 1997. Recently the Ballistic Missile Defense Office (BMDO) sponsored the Nuclear Electric Propulsion Space Test Program (NEPSTP) which was to demonstrate and evaluate the Russian-built TOPAZ II nuclear reactor as a power source in space. As of late 1993 the flight portion of this program was canceled but work to investigate the attributes of the reactor were continued but at a reduced level. While the future of space nuclear power systems is uncertain there are potential space missions which would require space nuclear power systems. The differences between …

Infrasound signals are regular acoustic signals in that they are longitudinal pressure waves albeit at rather low frequency. Many researchers would place infrasound frequencies in the range of 0.1 to 10.0 Hertz, with corresponding wavelengths of 3,300 to 33 meters. As with most wave phenomena, absorption decreases with decreasing frequency and infrasound propagates well in the earth's atmosphere, with geometric loss dominating other losses. This makes infrasound useful in remote monitoring activity such as the CTBT International Monitoring System (IMS). Atmospheric explosions generate a wide spectrum of acoustic frequencies; those in the audible domain are absorbed in the atmosphere and do not propagate to large distance. Lower frequency components are also present, and these do propagate to great distance. As the yield of the explosion decreases, the acoustic energy is concentrated at higher frequency than that for higher yield sources.