The story

Democratic presidential candidate Sen. Joe Biden on Tuesday said he can't believe President Bush hasn't known for months about a recent intelligence estimate that downplays the nuclear threat from Iran.

Other Democratic candidates also slammed Bush for continuing to ratchet up the rhetoric against Tehran.

On Tuesday the president acknowledged he had given a speech warning that Iran's nuclear development risked "World War III" about two months after his intelligence chief told him a reassessment of Tehran's nuclear ambitions was under way. Read full article »

All About Nuclear Weapons • Iran • Atomic Energy Organization of Iran