9/11 'mastermind' back before Guantanamo judge

The self-proclaimed mastermind of the Sept. 11 attacks and four accused co-conspirators appeared in public for the first time in more than three years Saturday, when US officials started a second attempt at what is likely to be a drawn out legal battle that could lead to the men's executions.

Khalid Sheikh Mohammed and his co-defendants were being arraigned at a military tribunal at Guantanamo Bay on charges that include that include 2,976 counts of murder for the worst terrorist attack on US soil. (AP)