demanded a complete halt and it will likely strain already-tense relations. high-level talks between the u.s. and china are being thrown off balance between an international custody dispute. it concern as leading human rights activist who escaped hout arrest in china and is now reportedly at large in beijing. nbc's kirr simmons is joining us live with more. >> the last we heard about chen guan guangcheng. do we know where he is now? >> the think about him is he's going to get a lot of interest from many in the states. this is a human rights campaigner who is opposed to forced sterilizations and forced abortions in china. he's been under house arrest in china since 2010. what apparently he did was scale the walls of his compound. then drive for hundreds of miles at speed, chased to beijing and