Members of the 81st Surgical Operations Squadron perform coronary artery bypass grafting surgery on Oct. 28, 2004, at Keesler Air Force Base, Miss. They are, from left, U.S. Air Force SENIOR AIRMAN Andrea Betancourt, USAF COL. Pratt, Dr. Krishnan, USAF AIRMAN 1ST Class Vanessa Casas and David Beeson. (PHOTO by Scott Corey) (Released)