
Ueslei Marcelino / Reuters
Youth take part in a "paint war" flash mob in the city park of Brasilia, Brazil on March 17.

Ueslei Marcelino / Reuters
A youth reacts during a "paint war" flash mob in Brasilia, Brazil, March 17.

Ueslei Marcelino / Reuters
A man reacts during a "paint war" flash mob in the city park of Brasilia, Brazil on March 17.