Detailed text transcripts for TV channel - CNN - 20170915:21:03:00
And our specialists and guests are standing by with full coverage. first, to the london underground bombing, which has triggered a sweeping manhunt. we have two reports. cnn's matthew chance is in london. but we begin with cnn's brian todd. brian, what are you learning? >> reporter: london very much on edge tonight. british prime minister theresa may announced the threat level has been raised from severe to critical. that means that another attack may be imminent. we're getting new details tonight on the bomb itself, which, if it had detonated completely, would have brought much more carnage o...
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