A defense official tells NPR that the rebels will be vetted and screened under top-secret protocols. Qatar, Jordan and Saudi Arabia will also be part of the effort.
The city has been the subject of bitter fighting, with rebels and government forces dividing a place that was once a productive economic engine. The U.N. wants to create a "freeze" on violence there.
The High Commissioner for Refugees wants the European Union to expand its Operation Triton to intercept and rescue would-be migrants, most of them trying to reach Italy.
In a statement, her family said they had received information the 26-year-old was dead. Mueller, who was captured in August 2013, was a prisoner of the self-described Islamic State when she died.
Word that some communication is taking place helps explain how military jets from the U.S.-led coalition and Syria have avoided clashing as they attack targets on the ground.
A manifesto posted online by the al-Khanssaa Brigade paints an idyllic picture of life for women and says "there is no greater responsibility for a woman than being a wife to her husband."
Moderate Syrian rebels took up arms to topple President Bashar Assad. But the U.S. is planning to train them to fight against a different foe, the self-declared Islamic State, instead.
A corner of the video game industry is covering the news through immersive experiences. One game transports players into the middle of the Syrian civil war.