Overview: 2010/07/21 Headlines: Probe Reveals BP Knew of Problems Ahead Deepwater Horizon Rig Explosion; British PM Rejects Calls for Inquiry into BP's Role in Release of Lockerbie Bomber; Democrats Break GOP Filibuster on Unemployment Aid Bill; Senate Committee Backs Kagan Supreme Court Nomination; USDA Reconsiders Firing of Black Official over <span class="caps">NAACP Speech; US Announces New Sanctions Against North Korea; Report: US Forces Step Up Presence in Pakistan; Afghan Soldier Kills Two US Military Trainers; Obama Praises International Conference on Afghanistan; Ex-Head of MI5: Iraq War Increased Threat of Terrorism in Britain; Pentagon to Rescind Rules on Journalists at Gitmo; Two Utah State Workers Lose Jobs for Creating List of Undocumented Immigrants; Oakland Approves Plan for Large Marijuana Production Plants; Palestinian Guilty of Rape after Consensual Sex with Israeli Jew