text:  The combined company's chief executive is to be Jeff Schell, the former head of NBCUniversal. David Folkenflik, NPR News. Yesterday was being billed as possibly the busiest travel day ever at the nation's airports and given the number of passenger screenings by the Transportation Security Administration. That was not just hype. According to the agency, TSA agents screened more than 3 million airline passengers in a single day, the first time that's ever taken place.