As the tech industry boomed, demand for visas intended for highly skilled workers has far outstripped their availability.

H-1B visas for international workers have been in the national spotlight. How many are there in? Where do they work? Here's what we know.

In recent days, Trump said he supported H-1B visas. In the past, he’s made comments about the program, saying, “We shouldn’t have it. Very, very bad for workers.”