In 2020, Iran struck back at the U.S. for killing Irans top military commander, firing missiles at two Iraqi military bases housing American troops; more than 100 U.S. service members were diagnosed with traumatic brain injuries after the attack. As Iran braced for a counterattack, the countrys Revolutionary Guard shot down a Ukrainian jetliner after apparently mistaking it for a missile; all 176 people on board were killed, including 82 Iranians and more than 50 Canadians. Operation Martyr Soleimani#OperationMartyrSoleimaniUkraine International Airlines Flight 752#UkraineFlight752#QassemSoleimani