Ann Romney, wife of Republican presidential candidate Mitt Romney, at the Republican National Convention. (Shannon Stapleton/Reuters)

During all the other speeches, the convention floor has been bustling with loud conversations and people scurrying from one side to another.

But the moment Ann Romney stepped on stage in a radiant red dress, the Tampa Bay Times Forum fell silent. The delegates looked up at the elaborate Frank Lloyd Wright-inspired set, with black-and-white family snapshots blown up on the screens behind Romney.

Her five sons sat with their wives, tears welling in their eyes. Ben and
Tagg were particularly emotional. And Janna Ryan, the wife of Rep. Paul Ryan, joined them in the family box, sitting next to Tim Pawlenty and his wife, Mary.