On the eve of the anniversary of the Madrid terrorist bombing that killed 190 people, U.N. Secretary-General Kofi Annan today warned of the continued danger of terrorists acquiring nuclear or biological weapons. "Nuclear terrorism is still often treated as science fiction. I wish it were. But unfortunately we live in a world of excess hazardous materials and abundant technological know-how, in which some terrorists clearly state their intention to inflict catastrophic casualties," he said in a speech in Madrid. On...