Overview: 2013/05/13 Headlines: Ex-Guatemalan Dictator Ríos Montt Imprisoned After Genocide Conviction; Atmospheric Concentration of Carbon Dioxide Hits 400ppm Milestone; Ex-PM Nawaz Sharif Wins Pakistani Election Amidst Rigging Claims, Violence; Cleveland Victims Thank Supporters; Paternity Test Confirms Suspect Fathered Rescued Child; 19 Shot at New Orleans Mother's Day Parade; IRS Apologizes for Scrutiny of Tea Party Groups; Activists Rally for Guantánamo Closure; Benghazi Emails Show White House Role in Talking Points; Report: CIA Relied on Libyan Militia to Guard Benghazi Compound; Co-Author of Heritage Foundation Immigration Study Resigns; Federal Judge Rejects Admin's Bid to Stay "Morning-After Pill" Ruling; Texas Authorities Launch Criminal Probe of Fertilizer Blast; Spaniards Mark 2nd Anniversary of "Indignados" Movement; Mothers' Group Holds Gun-Control Rallies Nationwide; Activists Stage Weekend Poor People's Campaign and March