Rubble and heavy damage remain on a deserted street during a government escorted visit to Yarmouk refugee camp in Damascus, Syria, Thursday, April 9, 2015. Islamic State fighters overran much of the camp last week, marking the extremists’ deepest foray yet into the Syrian capital. The IS incursion in the latest trial for Yarmouk and its estimated 18,000 remaining residents, who have already survived a devastating two-year government siege, starvation and disease. (AP Photo)