Protest

An elderly man reads protest messages outside the Congress building

NYPD officers in riot gear

An NYPD officer smiles during a protest

Protester waving flags

Graffiti calling for an end to the Internal Security Act

Police with shields and helmets in Whitehall

Young police officer in riot gear

Protest camps in the Plaza de Mayo

An NYPD lieutenant reviews police officers after a demonstration

Female police officer wearing visored helmet

View of the Museo Histórico Nacional del Cabildo y la Revolución de Mayo, Plaza de Mayo

Three officers in riot gear at Occupy Wall Street protest