Clinton to have own floor whips at Dem convention   Officials: Threat, powder sent to McCain office   AP NewsAlert   Obama says he's decided on running mate   Crude oil futures jump to $121 level on weaker dollar+   At top of Greenland, new worrisome cracks in ice      Saber-toothed cat fossils discovered in Venezuela   Texas man gets life for child sex club conviction   Seinfeld to be pitchman for Microsoft   Lowe pitches Dodgers past Rockies 3-1   ADVISORY - Start of KWS news cycle for Aug. 22+   Russians dig in but still promise Georgia pullout   Conservatives grow wary of mixing church, politics   US, Iraq close in on deal for pullout of US troops   Feds: Fire took down building next to twin towers   NTSB: Firefighting chopper lost power before crash   French deaths in Afghanistan show rising Taliban   Intel cuts electric cords with wireless power system   Russian maestro Gergiev performs in South Ossetia