The U.S. and Turkey have agreed in “principle” to provide air protection to Syrian rebels being trained and equipped to fight the Islamic State in Iraq and Syria (ISIS), according to Turkey’s foreign minister.

“There is a principle agreement on providing air support,” Mevlut Cavusoglu, the Turkish foreign minister, told the pro-government Daily Sabah newspaper in comments published Monday, according to The Associated Press.

Congress last year approved $500 million for a program to train 15,000 moderate Syrian rebels over three years as a ground force to take on ISIS, but some lawmakers say the U.S. will also have to protect the rebels from both ISIS and the Syrian regime when they go into battle. […]