For his reporting on financial corruption in the city of Bell, Ruben Vives shared the 2011 Pulitzer Prize for public service. Jay L. Clendenin/Los Angeles Times hide caption

itoggle caption Jay L. Clendenin/Los Angeles Times

People smoke marijuana, presumably, because it affects their brains, not despite that fact. Above, people in Sao Paulo, Brazil, campaign for the legalization of marijuana. Nelson Almeida/AFP/Getty Images hide caption

itoggle caption Nelson Almeida/AFP/Getty Images

When residents of the southern Chinese village of Shangpu staged an uprising, police set up a roadblock on the main road to keep outsiders away, including reporters. Here, a policeman mans the roadblock on Saturday. Peter Parks/AFP/Getty Images hide caption

itoggle caption Peter Parks/AFP/Getty Images