The two main groups fighting ISIS in Syria are the salafist Islamic Front and al-Qaeda’s official Syrian branch al-Nusra Front. Is that who they are planning to arm?

JEDDAH, Saudi Arabia (AP) — Secretary of State John Kerry signaled on Friday that the U.S. hopes to enlist moderate Syrian opposition fighters that the Obama administration has reluctantly decided to arm and train in the battle against militant extremists in neighboring Iraq.

Obama sent Congress a $500 million request Thursday for a Pentagon-run program that would significantly expand previous covert efforts to arm rebels fighting both the Sunni extremists and forces loyal to Syrian President Bashar Assad. The move that comes amid increased U.S. concern that the conflicts in Syria and Iraq are becoming an intertwined fight against the same Sunni extremist group.

If approved by lawmakers, the program would in effect open a second front in the fight against militants with the Islamic State of Iraq and the Levant, or ISIL, that is spilling over Syria’s border and threatening to overwhelm Iraq.

“Obviously, in light of what has happened in Iraq, we have even more to talk about in terms of the moderate opposition in Syria, which has the ability to be a very important player in pushing back against ISIL’s presence and to have them not just in Syria, but also in Iraq,” Kerry said at the start of a meeting with Syrian opposition leader Ahmad al-Jarba.