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Is one confirmed dead, 20 possibly in the hospital. >> you see were just learning that scotland yards going to hold a news conference to give us an update on whats happening. former homeland security official in the united states. we are going to hear from scotland yard tonight. it is 3:49 a.m. in london. the fact theyre coming out and making a public statement, what does that tell you? and what do they need to tell the public at this early hour? >> theres a couple things going on. so the news c...