Giuliani's business contracts tie him to the man who let 9/11's mastermind escape the FBI Three weeks after 9/11, when the roar of fighter jets still haunted the city's skyline, the emir of gas-rich Qatar, Sheikh Hamad bin Khalifah al-Thani, toured Ground Zero. Although a member of the emir's own royal family had harbored the man who would later be identified as the mastermind of the attack—a man named Khalid Sheikh Muhammad, often referred to in intelligence circles by his initials, KSM—al-Thani rushed to New York in its aftermath, offering to make a $3 million donation, principally to the families...