WASHINGTON (AP) — U.S. immigration authorities are barring entry to a 21-year-old Syrian cinematographer who worked on a harrowing film about his nation's civil war, "The White Helmets," that has been nominated for an Academy Award. According to internal Trump administration correspondence seen by The Associated Press, the Department of Homeland Security has decided at the last minute to block Khaled Khateeb from traveling to Los Angeles for the Oscars. The film focuses on the rescue workers who risk their lives to save Syrians affected by civil war. "The White Helmets" includes emblematic scenes of the deadly 6-year-old conflict: people digging through destroyed homes looking for survivors, at constant risk of "double tap" attacks that target first responders after they've arrived at the scene of a strike.