Los Angeles officials announced Tuesday that the city's subway will become the first mass transit system in the U.S. to install body scanners that screen passengers for weapons and explosives. "The deployment of the portable scanners, which project waves to do full-body screenings of passengers walking through a station without slowing them down, will happen in the coming months, said Alex Wiggins, who runs the Los Angeles County Metropolitan Transportation Authority's law enforcement division," reports the Associated Press reports: