Photo of the Day: Children walk past police officers of the Peacekeeping Unit Program in line during their inauguration ceremony at Vila Cruzeiro slum in Rio de Janeiro.

The introduction of the peacekeeping program in the region is part of the effort to crack down on crime and ensure the security as the city prepares to host 2014 World Cup soccer matches and the 2016 Olympic Games. (REUTERS/Ricardo Moraes)

See also our recent report from Rio by Lily Jamali.