 ABC News, I'm Chuck Severson. Under severe thunderstorm watches now and through the evening, over 60 million Americans along the East Coast, North Carolina to Maine, amid record-breaking July 4th travel. ABC's Faith Abubay. The TSA expects this holiday travel period to peak next Sunday, July 7th, anticipating it will screen more than 3 million passengers in one single day across the nation, which will be the agency's busiest day ever.