In Syria it's estimated 18,000 civilians are in desperate condition, trapped without food and water, as the self-proclaimed Islamic State has invaded a Palestinian refugee camp on the edge of the capital. A United Nations official calls the situation beyond inhumane. He is Christopher Gunness with the U.N. agency responsible for Palestinian refugees. He's based in Jerusalem and he joins me now.
BLOCK: And what's the latest you've heard about the siege of the Yarmouk refugee camp?