ROTC students at Old Dominion University subdued and killed a gunman, Mohamed Bailor Jalloh, who had opened fire in a classroom, killing instructor Brandon Shah and wounding two students.Jalloh, a former Virginia National Guardsman convicted of attempting to support ISIS, had been released from federal prison less than two years prior to the attack, during which he shouted "Allahu Akbar."The FBI is investigating the incident as terrorism, noting the absence of explosives or additional weapons and no link to the war in the Middle East.This event, occurring concurrently with another shooting in Michigan, has prompted renewed scrutiny on domestic terror threats and the monitoring of individuals with extremist ties.