WWII Ace Clayton Kelly Gross signed photo. 3x5inches CPT Clayton Kelly Gross (November 30, 1920-January 10, 2016) from Walla Walla, Washington is a Army Air Forces World War II Ace who shot down 6 enemy planes over Europe. Gross also flew planes in the D-Day invasion of Normany, France both on June 5 and 6, 1944. He was a recipient of the American Fighter Aces Congressional Gold Medal, the Distinguished Flying Cross and the Silver Star. He flew in 105 combat missions during WWII.