A black bloc is a tactic used by protesters who wear similar clothing including ski masks, scarves, sunglasses, goggles, gas masks, motorcycle helmets with padding, or other face-concealing and face-p
A black bloc group participating in a march near the World Bank, in Washington, DC, in 2009. Some black bloc protesters wear hoods, allowing their faces to be viewed, while others use such items as scarves, dark sunglasses or masks to conceal their faces as much as possible.
Black bloc members spray graffiti on a wall during the Iraq War protest in Washington, D.C., on 21 March 2009.