ROTC students subdued and killed a gunman who yelled “Allahu Akbar” before opening fire Thursday in an Old Dominion University classroom, killing one and wounding two, according to the FBI, which said the shooter had been in the Army and pleaded guilty in 2016 to attempting to aid the Islamic State. Dominique Evans, special agent in charge of the FBI’s Norfolk field office, said at a news conference that the Reserve Officers’ Training Corps students showed “extreme bravery and courage” and prevented further loss of life by stopping the suspect, identified as Mohamed Bailor Jalloh. The ROTC students subdued him...