The Most Memorable Photos of 2012

A boy looks up at police officers as protesters are blocked on their way to the interior ministry after a demonstration outside Cairo's Al Ahly football stadium, Feb. 2, 2012 in Cairo, Egypt. Three days of mourning have been announced and marches are scheduled to protest at the lack of protection provided by police who were at the stadium when the violence occurred. (Carsten Koall/Getty Images)