Nearly a dozen Americans are known to have traveled to Syria to fight for ISIS, the militant group that the Obama administration says poses the greatest threat to the United States since Al Qaeda before the Sept. 11, 2001, attacks.
The relief agency called the crisis “the biggest humanitarian emergency of our era,” as more than a million people have fled in the last 12 months alone.
Dozens of men, possibly Syrian soldiers, were lined up in their underwear and gunned down. In the Golan Heights, non-ISIS rebels seized United Nations peacekeepers.
President Obama confronted two volatile crises with restraint Thursday, saying he was not close to authorizing airstrikes in Syria and playing down an escalation of Russia’s intervention in Ukraine.
President Petro O. Poroshenko of Ukraine said that mercenaries and regular Russian servicemen were trying to overrun positions held by the Ukrainian military.