1:21ABC NewsApril 22, 2016Obama, Royals Celebrate Queen's 90th BirthdayThe president also met with Prime Minister David Cameron and discussed the United Kingdom's possible exit from the EU.Up Next in newsA royal handshake: Queen Elizabeth II meets American presidentsJuly 13, 2018Queen Elizabeth Celebrates 90th Birthday With Gun Salute, Cheering CrowdsApril 21, 2016Queen Elizabeth's Photobomb Creates World's Best SelfieJuly 24, 2014