Peter Bergen and David Sterman wrote for CNN about the Ohio State attack:
The violence this week on the campus of Ohio State University has, like previous attacks before it, provoked an outcry of fear and calls for greater security measures to protect Americans against terrorism. And yet, like other incidents before it, this attack was carried out by a terrorist whose inspiration to act reportedly came from within, not beyond, America's national borders.
On Monday, Abdul Razak Ali Artan, an 18-year-old legal resident of the United States whose family had fled Somalia, rammed a car into a group of people at Ohio State University whom he then attacked with a knife, injuring 11 before being killed by a police officer.
In a message that Artan is believed to have posted on Facebook minutes before the attack, he urged readers to "listen ... to our hero Imam Anwar al-Awlaki."