移民

美国历来都是一个移民国家，欢迎来自世界各地的信仰和背景各异的移民。奥古斯塔斯·谢尔曼拍摄了很多于19世纪末、20世纪初抵达美国的新移民的照片。

通过 #RoadtoRio 标签，了解这些在肯尼亚出生、移民到美国，现在将参加奥运田径比赛的赛跑运动员。

Nobel laureate and microbiologist Aziz Sancar helps students from his native Turkey adjust to the U.S., and introduces U.S. students to Turkish culture.

Music, language, education — all these corners of the culture have been touched by a 50-year-old law that opened U.S. immigration to more diverse peoples.