"We're waiting for that proposal but we're not waiting for long."<br/> <br />And with that, U.S. Secretary of State John Kerry told the U.S. Congress that a Russian diplomatic proposal to the international standoff over Syria shouldn't become a stalling tactic against the threat of military action.<br/> <br />SOUNDBITE: U.S. SECRETARY OF STATE JOHN KERRY SAYING:<br/> <br />"That this cannot be a process of delay, this cannot be a process of avoidance, it has to be real, it has to be measurable, it has to be tangible."<br/> <br />Syria accepted Russia's proposal that it give up its chemical weapons to avert U.S. military action, in response to a suspected chemical attack in August.<br/> <br />But as a possible diplomatic solution begins to take shape, Syrian rebels posted video, which Reuters cannot verify, of what they say are government warplanes bombing rebel positions in the capitol Damascus.<br/> <br />The air strikes, rebels say, show that the government thinks the West has lost its nerve and is backpedaling f
