Fire fighters attend a drill session during the Jilin Fire Fighting Emergency Rescue Drill On Setpember 28, 2011 in Changchun, Jilin Province of China. (Photo by ChinaFotoPress/Getty Images)

Photographer and artist Jill Greenberg poses at her home to promote her Exhibit “Glass Ceiling: American Girl Doll” And Billboard For LA on September 29, 2011 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)

Models pose at the Sachin + Babi Spring 2012 presentation during Mercedes Benz Fashion Week at Pier 59 on September 7, 2011 in New York City. (Photo by Slaven Vlasic/Getty Images)

Professional dog walker Jon Lovette of Jonny Walkers walks with dogs at Crissy Field on October 19, 2011 in San Francisco, California.

A zebra walks through the recently flooded Safari Park located at Safari World November 2, 2011 in Bangkok, Thailand. (Photo by Paula Bronstein /Getty Images)

A devotee of the Hare Krishna faith poses for a photograph during the festival of Rathayatra on June 12, 2011 in London, England. Rathayatra, or Chariot festival, features three huge, wooden chariots pulled by hand across Central London accompanied by constant singing, chanting, drums, cymbals and dancing. (Photo by Matthew Lloyd/Getty Images)

Climbers ascend the walls of the Westway Climbing Centre on June 15, 2011 in London, England. The Westway indoor climbing centre is located under the A40 flyover in Shepherd's Bush has over 350 climbing routes, some of which rise to over 14 meters. (Photo by Oli Scarff/Getty Images)

Munzin Chowdhury (C) and other enthusiasts perform yoga in Times Square during an event marking the summer solstice on June 21, 2011 in New York City. Thousands of yogis will attend the free day-long event in Manhattan on the longest day of the year. (Photo by Mario Tama/Getty Images)