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NEW YORK, UNITED STATES: Former New York City Mayor Rudolph Giuliani holds up a copy of his new book titled " Leadership" during a book signing at a New York bookstore 02 October 2002. Three days after the 11 September 2001 attacks, Giuliani told the US president he was ready to personally execute Osama bin Laden if the al-Qaeda leader was caught. In his book "Leadership" released 02 October, Giuliani said he was not joking in his offer made during his first meeting with President George W. Bush after the hijacked planes slammed into the World Trade Center towers. AFP PHOTO/Timothy A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP via Getty Images)

NEW YORK, UNITED STATES:  Former New York City Mayor Rudolph Giuliani holds up a copy of his new book titled " Leadership" during a book signing at a New York bookstore 02 October 2002. Three days after the 11 September 2001 attacks, Giuliani told the US president he was ready to personally execute Osama bin Laden if the al-Qaeda leader was caught. In his book "Leadership" released 02 October, Giuliani said he was not joking in his offer made during his first meeting with President George W. Bush after the hijacked planes slammed into the World Trade Center towers.               AFP PHOTO/Timothy A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP via Getty Images)