The agreement calls for pilots to be "professional," to communicate over a designated frequency if necessary, and to maintain a "safe distance" at all times.
Faced with delays, hundreds of people are being forced to camp outdoors along the route that they hope ends in Austria, Germany and other European Union nations.
The U.S. military gave no details about the Thursday airstrikes they say killed Sanafi al-Nasr. The Pentagon said he was "a longtime jihadist experienced in funneling money and fighters for al-Qaida."
President Obama has said the U.S. would not "make Syria into a proxy war between the United States and Russia." Given reports that Russia has bombed U.S.-backed rebels, we wondered, is it already?
The Turkish military said it sent the drone three warnings before shooting it down. Turkey did not identify the nationality of the drone. Russia said all its drones in Syria were accounted for.
Russia says its commitment there is limited, but some analysts are skeptical and warn Russia may find it increasingly difficult and expensive to maintain its Syrian operation.
The president wanted to bring home all U.S. troops during his tenure. But it now looks like U.S. forces will be fighting — on a limited basis — in a trio of wars when he leaves the White House.
Led by Kurds, the coalition could receive U.S. air support in the fight against both President Bashar al-Assad and ISIS. Its members also include Arabs and Assyrian Christians.
The Syrian performer has made his way through Europe while rapping about his experiences: "Lost between heaven and hell, I'm desperately trying to reach the light at the end."
The U.S. will shift the focus to training so-called "enablers" in Turkey. Those leaders of opposition groups will gather intelligence and coordinate airstrikes with existing fighters.