America Marks 9/11 Anniversary

Thirteen years after the attack and one day after the president again expands America's role in the Middle East.

In Pennsylvania the victims were lauded as heroes. At the Pentagon, President Obama spoke of a nation that refused to "give in to fear." In New York, a somber roll call of the dead was peppered with tributes and declarations of love.

The nation on Thursday marked the 13th anniversary of the 9/11 attacks at the three sites where four hijacked planes crashed, a minutes-long wave of tragedy that killed almost 3,000 people, triggered at least two wars and rocked the entire world.