"You have just opened the gates of hell on yourself, " said an Islamist cleric.

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"John McCain likes to say that he'll follow bin Laden to the Gates of Hell -- but he won't even follow him to the cave where he lives, " Obama charged.

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"He's just opened the gates of hell!"

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We also explored several pressing environmental issues as record levels of radiation were found in fish near Japan's Fukushima nuclear power plant and we delved into the Gates of Hell -- a burning gas crater in Turkmenistan that has been ablaze for 41 years.

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