EditorialNASA astronaut Mike Fossum during a spacewalk outside the International Space Station, Washington, District of Columbia, United States - 17 Jul 2011
EditorialAn image provided by the Air Force Medical Service History Office, Hubertus Strughold, center, with a pressurized chamber for use in eventual space medicine research, at the U.S. Air Force School of Aerospace Medicine of Falls Church, Va., in the 1950s. (Air Force Medical Service History Office via The New York Times)