Article Photos: THE RACE: Global uncertainty 11 years after 9/11



Republican presidential candidate Mitt Romney greets firefighters at Chicago O'Hare International Airport, Tuesday, Sept. 11, 2012. (AP Photo/Charles Dharapak)

Republican presidential candidate Mitt Romney greets firefighters at Chicago O'Hare International Airport, Tuesday, Sept. 11, 2012. (AP Photo/Charles Dharapak)