On Sept. 13, 2012, the House Armed Services tactical air and land forces subcommittee held a hearing on F-22A pilot physiological issues. Includes the opening statement of subcommittee Chairman Roscoe Bartlett (R-MD) as well as the prepared testimony of Air Force Maj. Gen. Charles Lyon, director of operations at Headquarters Air Combat Command; retired Air Force Gen. Gregory Martin, aircraft oxygen generation study chair with the Air Force Scientific Advisory Board; and Clinton Cragg, principal engineer at the NASA Engineering and Safety Center.