The Intelligence Support Activity, also known at various times as Mission Support Activity, Office of Military Support, Field Operations Group, Studies and Analysis Activity, Tactical Concept Activity
ISA emblem
Special mission unit
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A special mission unit, at one time referred to as a "tier 1" unit, is a designation for the United States military's most highly secretive and elite special operations forces. The term special missio
An Iraqi-American military interpreter pictured with Hussein shortly after his capture