CBS) Al Qaeda has developed a new tactic that allows suicide bombers to breach even the tightest security, as CBS News correspondent Sheila MacVicar reports. Inside a Saudi palace, the scene was the bloody aftermath of an al Qaeda attack in August aimed at killing Prince Mohammed Bin Nayef, head of Saudi Arabia's counter terrorism operations. To get his bomb into this room, Abdullah Asieri, one of Saudi Arabia's most wanted men, avoided detection by two sets of airport security including metal detectors and palace security. He spent 30 hours in the close company of the prince's own secret service...