Because most of them who can run, jump or swim are already in the United States.
Netflix and chili
They steal the green cards.
I'll catch you later!
A: Why are all those people running B: They are running a race to get a cup. A: Who will get the cup B: The person who wins. A: Then why are all the others running
Anyone who could run, swim or jump made it to the USA.
By swimming in the main stream.
Because the best you can get is bronze.
Because he was Snow'den.
Because anybody who can run jump or swim is in the States.
Put velcro on the ceiling.
Obesity
It depends on how close they are to the Mexico-United States border.