more on the situation. what is the u.s. willing to do independently remains an open question. two big issues t s at the wh house. and king abdullah showing up at any moment. nbc s chief correspondent richard engel is live in london. you ve had increedabdible repor. what is the latest out of syria on the suspected chemical attack? in this same area today, activists say there have been five more air strikes carried out either by russian aircraft or by syrian regime aircraft. doctors without borders say that some of the victims of this attack that have been treated in its partner facilities appear to show the symptoms that are, they say, consistent with those who have been impacted by a toxic nerve agent, a chemical weapon. the russians, however, the backers of president bashar al assad, have a different version of events. they say that no chemical weapon was, in fact, deployed.