Are There Really Jihadist Training Camps in the U.S.?

For years I have seen posters on Facebook and videos telling us that there are dozens and dozens, maybe even hundreds, of terrorist training camps throughout the U.S. I have greeted these reports with a mixture of some belief and a lot of skepticism.

It’s pretty clear from the September 11, 2001 massacre that there were Islamist sleeper cells in the United States. It is also pretty clear that jihadists get their inspiration from such savage organizations as ISIS and al-Qaeda, swear allegiance to them, and carry out terror attacks (such as in San Bernardino, Boston, Chattanooga, New York City, and elsewhere around the world). Why wouldn’t there be actual training camps hidden in the woods or the desert?