2013/05/02 Headlines: May Day Rallies Nationwide Back Immigrant, Labor Rights; 18 Arrested in Seattle May Day Protests; 3 Accused of Obstructing Boston Marathon Probe; Bolivia Orders Expulsion of USAID; North Korea Sentences U.S. Citizen to 15 Years; Obama Admin to Challenge Emergency Contraception Access for All Ages; Obama Taps Industry Lobbyist to Head FCC; Brother, 5, Kills Infant Sister With Children's Rifle; Florida Teen Charged, Expelled for Science Experiment Mishap; Disabled Turkey Plant Workers Awarded $240 Million in Damages for Abuses, Discrimination; Muslim Taxi Driver, Iraq War Veteran Accuses Aviation Exec of Assault, Hate Crime