President Obama has announced several rounds of economic sanctions on Moscow, acting with European allies. Here are answers to some simple questions about sanction specifics.
Hillary Clinton has again made sharp comments about Russian President Vladimir Putin, saying he is partly responsible for the crash of MH17. In recent months, she has been one of Putin's most vocal critics.
A new offensive is under way in the separatist region of Donetsk. The MH17 crash scene, meanwhile, has become chaotic, with international investigators finding access limited or blocked outright by rebels.