Attacks like Orlando don’t threaten U.S.’s existence

Does Marc Thiessen (Commentary, “After Orlando, Obama continues to be in denial about terrorism,” June 15) seriously believe that the sort of attacks that occurred in Orlando and San Bernardino threaten the existence of the U.S.? Really?

And what evidence does he have that the Orlando shooter, Omar Mateen, was “an Islamic State terrorist”? Did ISIS give him his AR-15?

This story was originally published June 29, 2016 at 10:48 PM with the headline "Attacks like Orlando don’t threaten U.S.’s existence."