more. a new terror tactic revealed wild fires. i m wolf blitzer. you re in the situation room. captions by vitac www.vitac.com we begin with new developments in a growing diplomatic crisis dogging the obama administration. the chinese dissident who escaped house arrest and sought refuge, but the u.s. embassy in beijing is now appealing directly to president obama for help. chen guangcheng was basically pushed out of the embassy and abandoned, but the top american diplomat in china tells cnn a very different account of what happened. cnn s stan grant is in beijing and has been following this story from the beginning. dramatic developments, huge interest at stake, stan. you had a chance to speak with the u.s. ambassador gary locke about all of this. what is the very latest? reporter: yes. he is gary locke, the man with the answers about what went wrong at the embassy. chen guangcheng said he was encouraged to leave and without knowing the full range of his threat that