"Any concerted plan that placed Lee Harvey Oswald in the gunner's seat," wrote Norman Mailer in "Oswald's Tale: An American Mystery," "would have had to have been built on the calculation that he would miss." Yet Mailer, whose research took him back to the city of Minsk, where Oswald had lived under constant KGB surveillance while in the Soviet Union, said he believed Oswald was likely to have been the perpetrator.