 After the announcement pilots could fly the F-117 during daytime and no longer needed to be associated with the A-7, flying the T-38 supersonic trainer for travel and training instead.In April 1990, two F-117 aircraft were flown into Nellis Air Force Base, Nevada, arriving during daylight and publicly displayed to a crowd of tens of thousands.Five Full Scale Development (FSD) aircraft were built, designated "YF-117A".