
When a catastrophic event like the downing of Malaysia Airlines Flight 17 occurs, there is an understandable demand for accountability. "We will not rest until we are certain that justice is done," President Barack Obama
wrote on Tuesday in a Dutch condolence book for the victims of the crash. In the immediate aftermath of the shoot-down, Ukrainian President Petro Poroshenko similarly vowed, "We are sure that those who are guilty in this tragedy will be held responsible."