Col. Darrell R. Gregg (center), Joint Test Element director at the U.S. Army Test and Evaluation Command, stands with his wife, Tina Gregg (right), during his retirement ceremony as Maj. Gen. Daniel Karbler, commanding general of ATEC, presents him a...

Col. Darrell R. Gregg (center), Joint Test Element director at the U.S. Army Test and Evaluation Command, stands with his wife, Tina Gregg (right), during his retirement ceremony at Aberdeen Proving Ground in Maryland, August 10, as Maj. Gen. Daniel ...

Maj. Gen. Daniel Karbler, commanding general for the U.S. Army Test and Evaluation Command, presents Col. Darrell R. Gregg (right), Joint Test Element director, with a certificate of appreciation for his honorable service signed by the President of t...

mand Sgt. Maj. Andrew Connette (left), command sergeant major of the Army Test and Evaluation Command, presents the United States flag to Col. Darrell R. Gregg, during a retirement ceremony August 10 at Aberdeen Proving Ground, Maryland. With him, st...