Article Photos: Fierce finish: Romney, Obama sharpen closing lines



President Barack Obama speaks during a campaign event at the University of Colorado - Boulder, Thursday, Nov. 1, 2012, in Boulder Colo. (AP Photo/Pablo Martinez Monsivais)

President Barack Obama speaks during a campaign event at the University of Colorado - Boulder, Thursday, Nov. 1, 2012, in Boulder Colo. (AP Photo/Pablo Martinez Monsivais)