NASA astronaut candidate Dr. Kjell Lindgren and Lt. Cmdr. Paul Easterling, a flight instructor with Training Air Wing 6, conduct a preflight check of the cockpit of a T-6A Texan II before an instrument training flight at Naval Air Station Pensacola. Lindgren is a member of the 20th class of NASA astronauts undergoing flight, wilderness survival, physiology and water survival training with the Navy.