EVER since Mehmet Ali Agca, a Turkish gunman, shot the late Pope John Paul II on May 13, 1981 in St Peter’s Square in Rome, investigators have tried to solve one of the 20th century’s greatest mysteries: did Agca act alone or was he obeying communist orders? This week an Italian parliamentary commission will officially conclude that Agca was part of a huge conspiracy masterminded by the GRU, the Soviet military secret service, on the orders of the politburo and Leonid Brezhnev, general secretary of the Communist party. The findings are already being considered by a Rome prosecutor who may...