IMAGE OF THE DAY

President Obama shakes hands with a man wearing a horse-head mask on a street in Denver, Colorado.

A worker rappels from the Cristo Redentor statue at the Corcovado in Rio de Janeiro.

Four-year-old African lion mother Tajiri plays with one of her cubs during their debut at the
Philadelphia Zoo Friday, Sept. 5, 2014, in Philadelphia. The four cubs were born in late June at the zoo.

Workers cleaning the four faces of the Great Clock, some 60 meters above ground, which contains the Big Ben bell