When the Islamic State took over large parts of northern Iraq this summer, including the areas where the minority Yazidi community lives, the U.S. carried out air strikes and halted the advance of the extremists.
Still, thousands of Yazidi women and girls have gone missing over the past few months and there are now reports they are being sold by the Islamic State as sex slaves.
"The Baptism of Christ" is a vividly colored, two-dimensional, egg tempera-on-panel work from the second half of the 16th century. But it already showed hints of the style that would later make him one of the Western world's most famous painters.
Sophia Vorontzova, a Russian artist now living in Germany, calls it his "signature in art."
Hundreds of service members and civilians from various nations lined the road to the landing zone at NATO headquarters in Kabul. They had gathered to salute the two U.S. Marines and two U.S. Army soldiers participating in Operation Proper Exit.
Moments later, two Blackhawk helicopters swooped in, kicking up dust and debris. The four service members disembarked and walk past the cheering audience. One soldier walks with a subtle limp. One Marine has a prosthetic right arm, and the left is missing below the elbow.