 The end of the holiday weekend saw the beginning of a new era in airline passenger volume. Here's ABC's Brian Clark. The holiday travel period is not fully over. The TSA projected it would screen 32 million people from the end of June through today. But yesterday, as expected, was the busiest day ever. Numbers show that for the first time in its history, the TSA screened more than 3 million travelers in a single day. Busy Roads 2 AAA says more than 70 million people drove to their holiday getaway.