AP Top News at 11:55 p.m. EDT

WASHINGTON (AP) - In a rapid and remarkable chain of events, Syria welcomed the idea of turning over all of its chemical weapons for destruction on Monday, and President Barack Obama, though expressing deep skepticism, declared it a "potentially a significant breakthrough" that could head off the threats of U.S. air strikes that have set the world on edge. The administration pressed ahead in its efforts to persuade Congress to authorize a military strike, and Obama said the day's developments were doubtless due in part to the "credible possibility" of that action. He stuck to his plan to address the nation Tuesday night, while the Senate Democratic leader postponed a vote on authorization.