Probably the closest thing to fireworks between candidates in tonight's debate was a series of exchanges between Obama, Kucinich and Gravel on the subject of Iran. Senator Barack Obama was asked a question about global warming and when his answer strayed into the area of terrorism, Dennis Kucinich took the opportunity to challenge Obama on a past statement that nothing was off the table when it came to Iran. Not one to pull any punches, Mike Gravel wasted no time in making his views on Iran crystal clear.

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