Overview: 2011/03/21 Headlines: Japanese Death Toll to Top 18,000; Food & Water Supplies Contaminated; U.S. & Allies Begin Bombing of Libya to Enforce No-Fly Zone; Yemeni Generals and Officials Defect After Killing of 35 Protesters; Thousands Protest in Syria; Egyptians Approve Constitutional Referendum; Leaked Photos Show U.S. Soldiers Posing with Dead Afghan Civilians; Over 130 Arrested at Iraq War and Bradley Manning Protests; Wisconsin Judge Blocks Union-Busting Bill; Israeli Military Intelligence Targets Foreign Activist Groups; Haitian Vote Held as Aristide Returns from Exile; U.N. Warns about Crimes Against Humanity in Ivory Coast; Thousands Protest in Senegal; Obama Kicks Off Latin American Tour; AT&T to Buy T-Mobile for $39 Billion; Newspaper Guild Calls for Boycott of Huffington Post