KC-46 conducts flight tests with E-4B Published March 12, 2021 By Giancarlo Casem 412th Test Wing Public Affairs EDWARDS AIR FORCE BASE, California -- An E-4B assigned to Eighth Air Force from Offut Air Force Base, Nebraska, conducted flight tests with the KC-46 Pegasus at Edwards Air Force Base, California, in February. (Air Force video by Giancarlo Casem)