U.S. first lady Michelle Obama waves at the media as she is greeted by British Prime Minister David Cameron and his wife Samantha as she arrives to visit them at 10 Downing Street in, London, Tuesday, June 16, 2015. Schoolgirls in east London greeted U.S. first lady Michelle Obama with song, interpretive dance and squeals of joy Tuesday as she traveled to the British capital to promote education for girls. (AP Photo/Matt Dunham)