Overview: 2011/04/18 Headlines: Gaddafi Forces Accused of Firing Cluster Bombs; 17 Reportedly Killed in Attack on Misurata; TEPCO Seeks 9 Months to Repair Plant; Clinton Visits Japan; House Approves GOP Spending Bill; Report: Walker to Propose Emergency Management Bill; Michigan Emergency Managers Target Elected Officials, Teachers; Bid to Repeal Ohio Anti-Worker Law Approved; Study: Dangerous Chemicals Used in Natural Gas Fracking; Georgia Approves Anti-Immigrant Law; 13 Killed in Syria Crackdown on Protests; Cables: U.S. Funded Syrian Opposition; Yemeni Forces Fire on Demonstrators; Study: U.S. Drone Strikes in Pakistan Killed 957 in 2010; Slain Italian Peace Activist Honored in Occupied Territories; Cuba Marks 50th Anniversary of Bay of Pigs; Castro Backs Term Limits; Texas Psychologist Barred from Death Row Evaluations; OECD: U.S. Has Highest Incarceration Rate, 9th Worst on Social Spending; 43 Killed in Hundreds of U.S. Tornadoes