US First Lady Michelle Obama (foreground L) and Cambodian First Lady Bun Rany (R), wife of Prime Minister Hun Sen gesture to students during their visit to a school in Siem Reap province on March 21, 2015. Michelle Obama was greeted by flag-waving schoolchildren March 21 during the first trip by a sitting First Lady to Cambodia as she pushes a US-led initiative to combat a "crisis" in girls' education. AFP PHOTO / TANG CHHIN SOTHY (Photo credit should read TANG CHHIN SOTHY/AFP/Getty Images)
