Obama steps into high-stakes debt-limit talks (AP)

A silhouetted President Barack Obama walks back to the Oval Office of the White House in Washington, Friday, June, 24, 2011, following his arrival on Marine One helicopter. (AP Photo/Pablo Martinez Monsivais)AP - Struggling to break a perilous deadlock, President Barack Obama took direct control Friday of national debt-limit negotiations with both Republicans and Democrats. With the White House warning the nation's economic stability is at stake, it's one of the most severe tests yet of Obama's presidency.