Keywords: US Navy 091104-N-9001B-052 NASA astronaut candidate Lt. Col. Mark Vande Hei and Lt. Cmdr. Patrick McCaslin, an instructor with Training Squadron (VT) 4, conduct a preflight check of the cockpit of a T-6A Texan II.jpg en PENSACOLA Fla Nov 4 2009 NASA astronaut candidate Lt Col Mark Vande Hei and Lt Cmdr Patrick McCaslin an instructor with Training Squadron VT 4 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 U S Navy photo by Ed Barker/Released 2009-11-04 091104-N-9001B-052 Navy http //www navy mil/view_image asp id 78876 U S Navy photo by Ed Barker PD-USGov-Military-Navy Naval Air Station Pensacola Beechcraft T-6 Texan II |