Activated at Griffiss AFB, New York in 1954, the mission of the squadron was to provide Electronic Counter-Measure (ECM) training and evaluation services to the various Aircraft Control and Warning Squadrons. The Martin B-57 Canberra, originally developed as a medium bomber for Tactical Air Command was being phased out in favor of the F-100 Super Sabre. Some of these B-57s were reassigned to the squadron to replace the B-29s and B-25s. Also the squadron was moved to Stewart AFB, New York as Griffiss was being turned over to Strategic Air Command.