i'm max austin. >>> the u.s. and ukraine say it was a russian made ground to service missile. russian president vladimir putin is under enormous pressure to step in and order the pro russian separatists to lay down their arms. bill black joins us now live from ukraine. you're at the crash site, phil? were, yes. and what we're seeing today shows more progress. what we're seeing is more control and more activity. firstly, with the control, there is some restriction to public access on this site. at the very least, vehicles are being prevented from moving down the road behind me. you can see over my shoulder, a very significant piece of the wreckage. there are others and the main crash site, clearly the greatest impact examine resulting fire. that's a few hundred yards down the road behind me. they're not letting vehicles down there. so some improvement in that sense, if you like, but by no means was this a controlled investigation scene just yet. people still have freedom of movement. people are still accessing it, people are still coming up to it. it is being contaminated, if y