 More than 3 million passed through U.S. airport security on Sunday, the first time that number of passengers has been screened in a single day as travel surges, according to the U.S. Transportation Security Administration. The record, which was widely predicted to happen at some point over the 4th of July weekend, topped the June 23rd mark of more than 2.99 million screened passengers. Eight of the 10 busiest days in TSA's history have come this year as the number of travelers tops pre-pandemic levels.