A S.W.A.T (Special Weapons And Tactics) team is an eliteSpecial Operations tactical unit in American and some international law enforcement departments. They are trained to perform high-risk operations that fall outside of the abilities of regular officers. Their duties include performing hostage rescues and counter-terrorism operations, serving high risk arrest and search warrants, subduing barricaded suspects, and engaging heavily-armed criminals. A SWAT team is often equipped with specialized firearms including assault rifles, submachine guns, shotguns, carbines, riot control agents, stun grenades, and high-powered rifles for snipers. They have specialized equipment including heavy body armor, entry tools, armored vehicles, advanced night vision optics, and motion detectors for covertly determining the positions of hostages or hostage takers inside of an enclosed structure.
The first SWAT team was established in the Los Angeles Police Department in 1968. Since then, many American police departments, especially in major cities and at the federal and state-levels of government, have established their own elite units under various names; these units, regardless of their official name, are referred to collectively as SWAT teams in colloquial usage.