July 21, 2014 4:09 PM EDT

In the wake of Malaysia Airlines Flight MH17, which was shot down last week, diplomatic pressure for Russia and Russian-backed separatists in eastern Ukraine continues to mount.

Malaysian Prime Minster Najib Razak recently announced an agreement with the leader of a pro-Russian separatist group to return bodies, hand over black boxes, and let independent international investigators access the crash site.

Here, international affairs expert Austin Long explains what the options are for the international community, as it seeks justice for victims.

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