William Calley, officer convicted for his role in My Lai massacre during the Vietnam War, dead at 80

​ William L. Calley Jr., the only US Army soldier to be convicted in the 1968 My Lai massacre, which saw more than 300 unarmed Vietnamese civilians killed by US soldiers in one of the most notorious war crimes in American history, has died. He was 80. Read More Breaking News, Latest News and Videos | CNN