Staring down the international travel booking barrel today. Current grappling with the question of whether, given a 3 ½ hour connection window, I’m willing to accept a connection that has me transfer from IAD to DCA, given there is train service between the two that takes 1 ½ hours to navigate (including walking time). Is two hours enough time to deplane, clear customs, and get through DCA TSA? Seems dicey, even with Global Entry.