Only days before the tenth anniversary of the 9/11 attacks, the United States is under a new terrorist threat. In a hastily called news conference late Thursday, New York Mayor Michael Bloombergwarned of “unconfirmed” intelligence that a terrorist attack was being planned to mark the tenth anniversary of 9/11. "We know the terrorists regard the anniversary as an opportunity to strike again. We do live in a world where we must take these threats seriously," Bloomberg said.