Initially, the F-16 was manufactured in two models: A (single-seat combat version) and B (combat-capable two-seat trainer). The F-16A first took flight in December 1976 and was first delivered to the 388th Tactical Fighter Wing in January 1979 . In the same month, they were delivered to the Belgian Air Force. The F-16 is the first American fighter to be concurrently deployed domestically and abroad. The B model is a trainer version with an extended canopy to accommodate a second pilot, also reducing fuel and avionics growth space. Typically the student pilot sits in the front cockpit with the instructor pilot behind.