An Air Force officer was among four killed Jan. 10 in the crash of a T-39 Sabreliner training aircraft in Walker County, Ga.

First Lt. Jason Davis, 28, was a student navigator with Training Squadron 86 at Naval Air Station Pensacola, Fla. He entered the Air Force on Nov. 14, 2001.

The others killed are Navy Lt. Jason Manse, an instructor, Navy Ensign Elizabeth Bonn, a student, and retired Navy Cmdr. Dave Roark, a civilian contract pilot.

The downed aircraft belonged to Training Squadron 86 and a search was immediately initiated after it failed to return to NAS Pensacola at the conclusion of a routine training flight. The wreckage was located Jan. 11.

The cause of the accident is under investigation.

(Information compiled from a Naval Education and Training Command press release)