The Transportation Security Administration (TSA) administrator David P. Pekoske, center, talks during a news conference in Los Angeles' Union Station on Tuesday, Aug. 14, 2018. Pekoske talked about the ThruVision detection technology that reveals a suspicious objects on people. Aiming to stay ahead of an evolving threat against transit systems worldwide, officials in Los Angeles are testing out the airport-style body scanners that screen subway passengers for firearms and explosives. (AP Photo/Richard Vogel)
