[1]: 34  Bull took leave from working at NASA Ames to earn a Master of Science and Ph.D. degrees from Stanford University in Aeronautical Engineering in 1971 and 1973, respectively.

[3] Following his flight training, from March 1959 to November 1960, he flew the F-3 Demon and F-4 Phantom II while assigned to VF-114 at the Naval Air Station in Mirimar, California.

Just before the May–June 1968 test, Bull was found to have a severe sinus problem, and was replaced with his backup, a Grumman consulting pilot.

[1]: 366 Bull was married to the former Nancy Laraine Gustafson of Seattle, Washington, with two sons and a daughter: Jeffrey Tyler (July 27, 1965 – January 28, 1977),[7] Scott A.

[3] Bull died on August 11, 2008, at the age of 73 in South Lake Tahoe, California, due to complications related to long-term asthma.