In the missile called a "SAM", it's what the "A" stands for
This truck/ crane, called a Guided Missile Transporter (GMT), 
removes spent missile ... Patriot's radar is somewhat unique in that it is a "
detection-to-kill" system, meaning that a single unit performs all search, 
identification, track,... [DOC] [TLE] Terminal High Altitude Area Defense - Wikipedia [PAR] Terminal High Altitude Area Defense (THAAD), formerly Theater High Altitude 
Area Defense, ... THAAD was developed as a need to develop missile defense 
system against Iraq's Scud missile attacks during the Gulf War in .... After a 
successful 12-month deployment by A-4, Alpha 2 took its place for a 12-month 
deployment.