US probes: Attacks coordinated to mark Sept. 11?

The Obama administration, roiled by the first killing of a US ambassador in more than 30 years, is investigating whether the assault on the U.S. consulate in Libya was a planned terrorist strike to mark the anniversary of the Sept. 11, 2001, attacks and not a spontaneous mob enraged over an anti-Islam YouTube video

President Barack Obama vowed in a White House address that the U.S. would "work with the Libyan government to bring to justice" those who killed Ambassador Chris Stevens and three other Americans. (AP)