On December 5, 1947, Jennings was transferred to Headquarters Eighth Air Force at Fort Worth, Texas, with duties as chief of staff of the Air Task Group, (Operation Sandstone - Atomic Bomb Test).
From July 7, 1948, to June 30, 1949, Jennings was assigned to the 22nd Bombardment Group as B-29 Group Commander,[REF] stationed at Smoky Hill Air Force Base, Kansas; a 3-month detachment in Lakenheath, England; and later at March Air Force Base, California.