Travelers walk underneath an American flag displayed at Ronald Reagan National Airport (DCA) in Washington, D.C., U.S., on Wednesday, Nov. 22, 2017. The trade association Airlines for America has projected that 28.5 million passengers will travel on U.S. airlines during the 12-day Thanksgiving air-travel period, up 3 percent from 2016. Photographer: Andrew Harrer/Bloomberg トランプ米大統領は、H-1Bビザ制度の大幅な見直