Black bloc near the World Bank in Washington, DC during feeder march to anti-war "March on the Pentagon" in 2009.
Ben Schumin
CC BY-SA 3.0
Own work, from <a rel="nofollow" class="external text" href="http://www.schuminweb.com/schumin-web/life-and-times/2009/crystal-city-1.php">March on Crystal City</a> photo set