President Donald Trump boards Air Force One for the first time to head to Philadelphia. https://t.co/n7TqA3VDnW pic.twitter.com/un52nNuxIJ — ABC News (@ABC) January 26, 2017 Pres. Donald Trump takes off for the first time in Air Force One to head to Philadelphia. https://t.co/n7TqA3VDnW pic.twitter.com/qu0uuLY8ZP — ABC News (@ABC) January 26, 2017