Answer on @Quora by Wirawan Winarto to What are some major differences between the USA – Xochielt Sanchez
Answer by Wirawan Winarto:
Interracial friendships. Before I went to United States, I thought race is no longer an issue. In groups of six students (what I had seen on TV), there must be around two Black kids and one Asian kid among other White kids, just like the actual racial composition of United States citizens (and maybe some Hispanic kids as well).
And to my surprise, it is not. Whites hang around with Whites, Blacks with Blacks, Asians with Asians, etc.