Following the Crossroads project, August 23, 1946, Jennings was assigned duty as deputy commanding officer of the 509th Bombardment Group with additional duties as deputy base commander. The 509th was Heavy Bomber Air Force with nuclear strike capability that became fully operational in February 1947. On July 8, 1947, Colonel William H. Blanchard, the 509th Base Commander issued an official Army Air Force press release stating that the base intelligence office had recovered a so-called "flying disk" not far from Roswell triggering the Roswell incident. Apparently, wreckage had been found the previous week by a local rancher, and once General Roger M. Ramey was informed, he ordered it be flown to Fort Worth Army Air Field. Although, then Lt. Col. Jennings, never confirmed his involvement with any such incident, he has been repeatedly identified in numerous reports and affidavits to have been personally involved, including piloting the B-29, with the recovered and questionable wreckage, to Ft. Worth Texas.