 We'll start at the airports where TSA is expecting to screen more than 3 million travelers. Airlines are ready. American is expecting the busiest day of the entire summer with more than 6,500 flights taking off. Delta and United preparing for the travel rush as well. But nowhere will it be busier with than on the roads. More than 60 million people driving to their destinations this 4th. That's 2.8 million more people on the roads than last year.