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Minutes after a loud blast happened and people started to panic. and somebody screamed, the end of the earth! reminded me of action movies like terminator 4. the light was very bright, looked like a very bright sun and lasted for three seconds and three minutes later, the blast happened. >> megyn: can you imagine what would be going through your mind? greg palkot with the latest in london. >> reporter: megyn, weve been monitoring all day the spectacular amateur video coming in from that russian ...