In recent days, a debate between Elon Musk and X users has renewed scrutiny of the H-1B visa. Here are some key facts about the work visa, which is unpopular with many Americans but a favorite of Big Tech. What Is an H-1B? The H-1B, created by the 1990 Immigration Act, is a temporary visa that allows nonimmigrants to legally work in the United States in “specialty occupations.” Immigration law defines “specialty occupations” as ones that require at least a bachelor’s degree and involve “theoretical and practical application of a body of highly specialized knowledge.” In practice, most H-1B visa holders work in programming and related areas….