A woman sits next to a Gollum figure on the “Middle-earth Shuttle” subway train November 18, 2003 in New York City. The train's cars were decorated with Middle-earth creatures, vines, moss and stones to celebrate the November 18 DVD and VHS release of the Special Extended Edition of The Lord of the Rings: The Two Towers. (Photo by Mario Tama/Getty Images)

Chinese journalists dressed up like Santa Claus sit on a subway train, during a Performance Art Show promoting their fashion newspaper on December 15, 2004 in Shanghai, China. As China adopts similar traditions as the Western world, Christmas has become a time for marketing and promotions. (Photo by China Photos/Getty Images)

U.S. Navy sailors Christina Montgomery (C) and Leanne Duffy (R) ride the subway during Fleet Week festivities May 28, 2004 in New York City. (Photo by Mario Tama/Getty Images)

A security man holds a sign that reads “Women Only” in front of a carriage for female passengers only at a metro station May 11, 2005 in Tokyo, Japan. Nine private railways and subway trains operated by the Tokyo metropolitan government began running “Women Only” carriages during the morning hours in order to prevent railway gropers in crowded trains. (Photo by Junko Kimura/Getty Images)

Women ride a train in a compartment for “Women Only” at Shinjuku station July 8, 2003 in Tokyo, Japan. (Photo by Junko Kimura/Getty Images)

Revelers kiss while riding the subway in the early morning hours January 1, 2007 in New York City. (Photo by Mario Tama/Getty Images)

A South Korean manl sits inside a “No Tobacco Theme” subway on May 31, 2005 in Seoul, South Korea. (Photo by Chung Sung-Jun/Getty Images)

Revelers ride the subway minutes before midnight December 31, 2006 in New York City. (Photo by Mario Tama/Getty Images)

Nuns from the Servents of the Lord and the Virgin of Matara from Upper Marlboro, Maryland, sing on the subway after attending Mass with Pope Benedict XVI at Yankee Stadium April 20, 2008 in New York City. (Photo by Chip Somodevilla/Getty Images)

Revelers pose next to a homeless man while riding on the subway before midnight December 31, 2006 in New York City. (Photo by Mario Tama/Getty Images)

A groom from the U.S. kisses his bride as they attend a collective wedding ceremony on a subway train January 1, 2006 in Nanjing, Jiangsu Province, China. Six newlywed couples attended the wedding, which was the first collective wedding in a subway, according to local media. (Photo by China Photos/Getty Images)

A boy on a subway clutches a box containing his pet dog on March 7, 2005 in Beijing, China. China has about 150 million pet dogs, about one for every nine people, and pet owners in Beijing spend more than 500 million yuan (US$60 million) on their pets a year, according to the China Animal Agriculture Association's National Kennel Club. (Photo by Cancan Chu/GettyImages)