u.s. would not use ill many tear action. the general defending those calls. reporter: he is. he said the calls to his chinese counterpart were perfectly within the duties and responsibilities of his job, saying the calls are routine and done to reassure allies and adversaries. in this case, he said, in order to assure strategic spabic staby and said he ll mount a vigorous defense when called to congress. thank you, martha. now to the nation s capitol. authorities warning of violence in threats of chatter. rachel scott on the hill tonight. reporter: tonight washington, d.c. s police chief warns they ve picked up chatter about possible violence tomorrow, and they re taking no chances. we saw block of new fencing, new surveillance cameras, beefed up security. we have a strong plan in place to ensure that it remains peaceful and if violence does
the u.s. that favors fill tear action. is a diplomatic solution even possible? we re in washington with more. reporter: yeah, the trouble is peace talks have been the center piece for the u.s. strategy. now they re in disarray. the u.s. and russia are pointing fingers at each other. john kerry blaming russia for giving the assad regime both weapons and diplomatic cover to continue, in fact, accelerate the violence there. russia says it is u.s. betting egg on a military solution. cnn s found evidence of mass graves and execution by al qaeda linked terrorists. president obama is said to be looking for new policy options but he has rejected moves raining to air strikes.