 A record 3 million people passed through security screening at America's airports on Sunday. The record topped the June 23rd mark of more than 2.99 million screened passengers. Eight of the 10 busiest days in the TSA's history have come this year as the number of travelers tops pre-pandemic levels. TSA was created after the terror attacks on September 11th, 2001, and replaced a collection of private security companies that were hired by airlines.