The CBP One app, a government platform that the Biden administration used to admit more than 740,000 immigrants into the United States, was shuttered within moments of President Donald Trump taking office this afternoon.

Customs and Border Protection announced Monday afternoon that CBP One would no longer allow immigrants outside the U.S. border to schedule appointments with U.S. customs officers at ports of entry on the southern border or submit information for permission to fly on commercial flights into the country from Cuba, Haiti, Nicaragua, and Venezuela.