DENVER -- Passengers aboard a United Airlines flight had some help when they had to take matters into their own hands to prevent Jose Manuel Pelayo-Ortega from bringing their plane down. Three Secret Service agents headed west to join President Bush's entourage joined with passengers to subdue Pelayo-Ortega when he tried to open one of the doors on the Airbus A-320. "Had he opened the door, we'd all be dead," passenger Donna Bell of Visalia, Calif., told the Sacramento Bee after the plane was searched and allowed to continue westward. Secret Service spokesman Eric Zahensaid three agents between assignments help...