Top US military official says 500 troops to remain in Syria

US troop levels in northern Syria will probably stabilize around 500, a top American military leader said Sunday, weeks after President Donald Trump had announced a complete withdrawal.

"There will be less than 1,000, for sure," General Mark Milley, chairman of the Joint Chiefs of Staff, said on ABC's "This Week." "Probably in the 500ish frame, maybe six."