Second Suspect in Giffords Shooting Cleared: Police

Arizona authorities say a second man has been cleared of any involvement in the attempted assassination of US Rep. Gabrielle Giffords in Tucson. A sheriff's deputy says the man, who was caught on a security camera near the scene, was a cab driver who drove the gunman to the grocery store outside of which the shooting occurred, and went into the store because the gunman apparently hadn't paid his fare. Click for full background on the tragedy.