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January 9, 2008
Images credited to the National Science Foundation, a federal agency, are in the public domain. The images were created by employees of the United States Government as part of their official duties or prepared by contractors as "works for hire" for NSF. You may freely use NSF-credited images and, at your discretion, credit NSF with a "Courtesy: National Science Foundation" notation.
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Study shows officials should consider public health impacts of indirect exposure to extreme stress.
Stress and fear in the aftermath of terrorist attacks on the World Trade Center and the Pentagon on Sept. 11, 2001, may have prolonged health effects for Americans.
Credit: Morguefile
Images credited to the National Science Foundation, a federal agency, are in the public domain. The images were created by employees of the United States Government as part of their official duties or prepared by contractors as "works for hire" for NSF. You may freely use NSF-credited images and, at your discretion, credit NSF with a "Courtesy: National Science Foundation" notation.
Additional information about general usage can be found in Conditions.
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Related story: 9/11 Attacks American Hearts