Former Assistant FBI Director Steve Pomerantz said on "America's News Headquarters" today that there is no way to totally eliminate the threat of lone wolf terror attacks.

"People talk about eliminating this kind of a threat. We just simply can't eliminate it. We can minimize it," Pomerantz said. "At the end of the day, it's really not possible to totally predict and see every single one."

Elizabeth Prann noted that many lone wolf attacks, such as the horrific Chattanooga shooting, appear to be inspired by social media. She asked if there's more to be done to counteract that disturbing trend.

Pomerantz said probably not, due to the overwhelming amount of data, not to mention the legal restrictions that come along with living in a free country.

"There comes a point when you're doing pretty much everything you can," Pomerantz said. "That doesn't mean that we don't need to keep trying to do better and trying be more sophisticated and more focused."

"The number of vulnerabilities in a society such as ours, the number of potential sites for these kinds of attacks is tremendous. You can only do so much to harden those targets."

Watch more above.

Chattanooga Gunman's Family Breaks Silence, Expresses 'Shock, Horror and Grief' Over Deaths

Sailor Injured in Chattanooga Attack Dies, Death Toll Now 5

Ft. Hood Victim: Gun-Free Zones 'Ridiculous and Absurd'