where president obama held a news conference today. we begin with steve in kiev. steve, what s the latest? reporter: well for ukrainian politicians there s no doubt about who is responsible for this tragedy, they are pointing the finger straight at russia. ukrainia officials calling this an act of terrorism. a lot of real anger reaching a peak after three months of fighting here from ordinary citizens on the streets. they are pushing their government to respond and to respond in force to enact which has outraged a lot of people. that crash site is 25 miles from the russian border it s still an active fighting zone, pretty much controlled by the rebels but a lot of shooting going on. it s hard to get a clear analysis of what s going on as far as the plane goes. experts from the european oesc have arrived on the scene but say the rebels won t let them do their job. how has this tragedy affected the fighting on the ground which has shown global implications.