921st AC & W

The **921st Aircraft Control and Warning Squadron (AC&W)** was a United States Air Force unit activated during the early Cold War era. Established in 1952, the squadron was responsible for operating radar sites to detect and track potential airborne threats, primarily along the northern approaches to North America. Stationed in Canada as part of the Pinetree Line, the 921st AC&W played a key role in North American air defense by providing early warning and ground-controlled interception capabilities. The unit was inactivated in 1961 as radar technology and continental defense strategies evolved, leading to changing requirements for such units.