The move would constitute a reversal of Obama's earlier opposition to introducing the weaponry into the conflict.
Saudi Arabia is sure to welcome the potential step. The Saudis has been pressing the White House to allow the man-portable air-defense systems, known as "manpads," into Syria. Obama arrived in Saudi Arabia today and is meeting with King Abdullah.
Allowing manpads to be delivered to Syrian rebels would mark a shift in strategy for the US, which until this point has limited its assistance to humanitarian aid and small weapons and ammunition.