What brought them to Washington, on flights that turned into airborne pep rallies, on buses that left at midnight, on foot from the four corners of a city on lockdown?

• 在森严的警戒中，航班如同聚会，汽车午夜出发，人们从城市的各个角落步行前往，是什么东西将他们带到了华盛顿？