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.