Secretary of State John Kerry said today that Syria's President Assad could avert an attack by handing over all his chemical weapons to the UN in one week. Russia has urged Assad to do that, and Assad says that might be a good idea. At a White House briefing today, Deputy National Security Advisor Tony Blinken vowed to consider the option, but observed that "it's clear that this proposal comes in the context of the threat of US action… So it's even more important that we don't take the pressure off and Congress give the President the authority he's requested." Ken Dilanian is intelligence and national security correspondent for the Los Angeles Times.