The United States says it knows who's responsible for the death of all 298 people on board the Malaysia Airlines Boeing 777 which was shot down on the Russia – Ukraine border en route from Amsterdam to Kuala Lumpur.
The President of the United States weighed in Friday about where the pro-Russian rebels that the U.S. says are likely responsible for shooting down this plane, are getting their support.
"A group of separatists can't shoot down military transport planes, or they claim, shoot down fighter jets, without sophisticated equipment and sophisticated training and that is coming from Russia," Obama says.
Obama also confirmed that investigators from the FBI and the National Transportation Safety Board will assist Ukrainian officials in the investigation.
One of the things they will be looking at is the MH17's flight path.
Why did Malaysia Airlines fly over such a dangerous area- one which several airlines chose to avoid?
CNN's Rene Marsh looks at the red flags that preceded this week's shoot-down of Malaysia Airlines Flight 17.