- Period:
- Second World War (1939-1945)
- Rank:
- Flight Sergeant
- Unit:
- No. 76 Squadron, Royal Air Force
- Awarded on:
- May 29th, 1942
"This airman has completed many successful sorties including attacks on targets at Berlin, Mannheim, Stuttgart and Stettin. One night in April, 1942, he was the captain of an aircraft detailed to attack the German naval base at Trondheim. After releasing the bombs his aircraft was hit by anti-aircraft fire which caused one engine to fail and the bomb doors could not be closed. He succeeded in returning to base and landed safely with the bomb doors still open. The following night, as his former aircraft was not serviceable Flight Sergeant Clack volunteered to fly another aircraft to attack the naval base again. He delivered his bombs successfully and machine gunned gun emplacements. His courage and determination have been outstanding."