If Osama Bin Laden is ever caught alive, former Mayor Rudy Giuliani has one wish: He wants to be the one to execute the terrorist. In his new book, "Leadership," Giuliani revealed how he asked President Bush - three days after the Sept. 11 terror attacks - if he could be the executioner. "What can I do for you?" Bush had asked. "I told him, 'If you catch this guy, Bin Laden, I would like to be the one to execute him.' "I am sure he thought I was just speaking rhetorically," Giuliani wrote. "But I was serious. Bin Laden...