This week in Edwards flight test history Published Nov. 3, 2016 412th Test Wing Public Affairs EDWARDS AIR FORCE BASE, Calif. -- On Nov. 3, 1966, the North American XB-70 Valkyrie flights resumed as aircraft No. 1 made the first of nine flights in support of the National Sonic Boom Program. This was a joint NASA/U.S. Air Force research program, which concluded Jan. 31, 1967.