US First Lady Michelle Obama (L) gestures as she walks with a Cambodian guide during her visit to Angkor Wat temple in Siem Reap province on March 21, 2015. Michelle Obama called on schoolgirls to stay in school to push for equality and hold their leaders accountable on March 21, during the first trip by a sitting US president's wife to Cambodia. AFP PHOTO / TANG CHHIN SOTHY / AFP / TANG CHHIN SOTHY (Photo credit should read TANG CHHIN SOTHY/AFP via Getty Images)
