The head of a Western-backed rescue group in Syria known as the White Helmets has been refused entry into the United States, where he was slated to receive a humanitarian award. Raed Saleh landed at Washington’s Dulles International Airport on Monday, only to be told his visa was canceled. He was put on a flight back to Turkey. The State Department has refused to provide details. His group, Syria Civil Defense, is famous for coordinating thousands of volunteers to rescue people trapped in rubble after airstrikes.