Assassination of Juvénal Habyarimana and Cyprien Ntaryamira
On the evening of 6 April 1994, the aircraft carrying Rwandan president Juvénal Habyarimana and Burundian president Cyprien Ntaryamira, both Hutu, was shot down with surface-to-air missiles as their jet prepared to land in Kigali, Rwanda; both were killed. The assassination set in motion the Rwandan genocide, one of the bloodiest events of the late 20th century.
Source: Wikipedia — Assassination of Juvénal Habyarimana and Cyprien Ntaryamira (CC BY-SA 4.0)