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Shuttle collection
As excitement builds for the first space shuttle launch in over two years, this comprehensive video selection captures the major pre-flight events for Discovery and her seven astronauts.
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What is NASA's future?
Administrator Mike Griffin is the sole witness testifying before the House Science Committee in this hearing on the future of NASA. (2hr 01min 09sec file)
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Address to NASA
One day before beginning the space shuttle Flight Readiness Review, Administrator Mike Griffin gives a televised address to agency workers and answers questions. (26min 09sec file)

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Shuttle task group
The Stafford-Covey Task Group holds a news conference from NASA Headquarters following the panel's final public hearing on the space shuttle program. (55min 58sec file)

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Supply ship docking
The 18th Progress resupply ship launched to the International Space Station is guided to docking with the Zvezda service module's aft port via manual control from commander Sergei Krikalev. A problem thwarted plans for an automated linkup.

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Space radation research proposals funded by NASA
Posted: July 7, 2005

NASA selected 21 space radiation research proposals for funding. Approximately $19 million will be spent on the research to support the Vision for Space Exploration.

The goal of NASA's Space Radiation Program is to ensure humans can safely live and work in space. Safely means acceptable risks are not exceeded during crews' lifetime. Acceptable risks include limits on post and multi-mission consequences, such as excess lifetime fatal cancer vulnerability.

Exposure to radiation during space flight is unavoidable. Space radiation penetrates the crew, spacesuits, spacecraft, habitats, and equipment. The interaction of radiation with materials changes both; and the interaction with living organisms leads to potentially harmful health consequences. The consequences include tissue damage, cancer, cataracts, electronic upsets, and material degradation.

Space radiation is distinct from terrestrial forms. Space radiation is comprised of high-energy protons, heavy ions and their secondaries produced in shielding and tissue. Since there are no human epidemiological data for these radiation types, risk estimation is derived from mechanistic understanding. The estimates are based on radiation physics, molecular, cellular, and tissue biology related to cancer and other risks.

NASA received 115 responses to the request for proposals issued on August 24, 2004. Proposals were peer-reviewed by scientific and technical experts from academia, government, and industry. The 21 proposals will seek to reduce the uncertainties in risk predictions, including cancer, degenerative tissue damage, cataracts, hereditary, fertility, and sterility. They also cover acute risks and development of effective shielding or biological countermeasures for them.

For a list of grant recipients on the Internet, visit: