Video: Thousands rally over Trayvon Martin shooting Add to ... Reuters Video Published Saturday, Mar. 24 2012, 10:43 PM EDT Last updated Monday, May. 21 2012, 3:05 PM EDT Crowds gathered in Washington to demand criminal charges be brought in the death of Trayvon Martin, a black Florida teenager who was shot and killed by a neighborhood watch volunteer in February Watch More Video: Thousands rally over Trayvon Martin shooting Olivia Chow calls on Rob Ford to 'pack up the circus tent' Rob Ford swears in video in front of teen Rob Ford booed, cheered at St. Patrick's Day parade in Toronto Polls close in Crimea showing massive support for union with Russia Russians welcome Crimea referendum Pro-Russians smash in Prosecutor's office in Donetsk In Crimea, a woman who trusts her 55 cats more than people Malaysia asks for data to help find missing jet How the Red Cross is engaging the world in a digital age Red Cross keeping a close eye on Crimea 'I think that this referendum is illegal': Kiev resident on Crimean referendum New poll puts Chow ahead of Ford Investigators look for motive in Malaysia plane disappearance Emaciated dog rescued from Texas dumpster U.S. Navy scans ocean for missing Malaysian Airlines flight. Comedian David Brenner, 'Tonight' favorite, dies Ikea breastfeeding controversy takes another twist Officers curb Montreal protest against police brutality Search shifts in missing plane investigation Tensions high ahead of Crimea referendum Comments AA More Related to this Story Why did Trayvon Martin die? Video: Congressman dons hoodie in U.S. House Video: Just who is George Zimmerman?