Overview: 2011/04/19 Headlines: E.U. Considers Sending Ground Troops into Libya; Tear Gas Grenades Thrown into Home of Bahraini Activist; Exposed: Link Between British Oil Firms and Invasion of Iraq; Supreme Court Rejects Appeal from Uyghurs at Guantánamo; WikiLeaks: U.S. Tried to Stymie U.N. Probe of Israeli War Crimes in Gaza; Fidel Castro Steps Down from Party Leadership; Michigan City Takeover Plan Criticized as Attack on Democracy; U.S. Firms Shipped Millions of Jobs Overseas in 2000s; Income for Nation's Wealthy Soars as Tax Rate Falls; Nuclear Plant Protester Killed in India; Jonathan Reelected in Nigeria; Deadly Rioting in North; Ex-General Linked to Abu Ghraib Abuses Considers Senate Run; Pentagon Probe Clears McChrystal; Magazine Defends Reporting; 21 Arrested at Interior Department Sit-In; Thousands of Climate Activists Protest Outside White House; Obama to Climate Activists: "Push the Envelope"; Obama Admin & Power Companies Aim to Block Global Warming Lawsuit; Pulitzer Prize Awarded to Online Series on Wall Street