Since handing out its first award in 1955 for a picture of a motorcyclist skidding out of control, the annual World Press Photo contest has grown into photojournalism's premier event. The 50th-anniversary exhibition, featuring prize-winning news images from 2004, opens tomorrow at the United Nations headquarters in New York. This year's Photo of the Year award went to the Indian photographer Arko Datta for his shot of a woman in Cuddalore, in southern India, lamenting the death of a relative killed in the tsunami. World Press Photo, a nonprofit foundation based in Amsterdam, also handed out prizes to more than...