An al-Qa'eda terrorist has confessed that he planned to drive a giant explosive device into a United States air force bunker in Belgium believed to contain nuclear warheads. News of the plot came as America gave warning that a broadcast thought to contain the words of Osama bin Laden foreshadowed a likely attack. The FBI said national landmarks, the aviation, oil and nuclear industries were possible targets. In an interview with a Belgian radio station, Nizar Trabelsi, 31, a Tunisian former professional footballer, said he had hoped to attack the Kleine Brogel base in eastern Belgium with a bomb similar...