paint which was intended to minimize detection by searchlights. The crew was two; one pilot and one photo-navigator. It was intended that only a minimum of effort would be required to convert the RB-57A to a bomber mission, which was never actually done in practice. On 15 October 1962, the 117th was authorized to expand to a group level, and the 190th Tactical Reconnaissance Group was established by the National Guard Bureau. The 117th TRS becoming the group's flying squadron. Other squadrons assigned into the group were the 190th Headquarters, 190th Material Squadron (Maintenance), 190th Combat Support Squadron, and the 190th USAF Dispensary. The unit continued to operate its Canberras at Hutchinson ANGB until 1967, when the 190th TRG and its personnel, aircraft and equipment permanently relocated to Forbes AFB, near Topeka after Strategic Air Command vacated its facilities and transferred Forbes AFB to the Tactical Air Command. The 117th continued to operate the RB-57s until 1972 when the aged aircraft were retired and sent to AMARC at Davis-Monthan AFB, Arizona. In return the 190th began to receive the Martin B-57G variant that were modified as night intruders for use in the Vietnam War under a project known as Tropic Moon. B-57Bs were modified with a low light level television camera plus a forward-looking infrared (FLIR) set and a laser guidance system. The laser guidance system now made it possible to carry four 500-lb "smart bombs" on the underwing pylons. With the receipt of the B-57Gs from their combat service in Thailand, the unit was re-designated as the 190th Tactical Bombardment Group on 12 June 1972. The service of the B-57Gs was short, as operation of these B-57Gs proved to be expensive, and the aircraft were hard to maintain in the field. They served until 1974, when they were consigned to storage at Davis Monthan AFB. Forbes AFB was ordered closed by the Department of Defense as part of a post-Vietnam reduction in force on 17 April 1973. Most of the facility was turned over for civilian use, however the 190th TBG retained a small portion of the base, being renamed Forbes Field Air National Guard Base. In April 1974, the unit converted to EB-57B Canberra electronic countermeasures aircraft and became the 190th Defense Systems Evaluation Group. The 190th deployed aircraft to bases throughout the US, Canada, and Europe providing Electronic Counter-Measure (ECM) training and evaluation services to the various