Militants have been using drones as deadly weapons in Middle East war zones, raising concerns that terrorists could use drones to launch an attack on U.S.

Bryan Llenas reported on "America's Newsroom" today about the "counter-drone industry," as American companies develop technology to face the growing threat of weaponized drones.

He said that dozens of companies are offering anti-drone "guns" that disable a drone's signals, forcing it to land or return to its starting point.

The DroneGun, from the company DroneShield, is reportedly effective from as far as 1.2 miles away.

Llenas said that the company Department 13, on the other hand, is offering software to detect unwanted drones and take full control of them.

He said that so far, the biggest customer for counter-drone technology is the Department of Defense.

"The military continues to put out calls for new methods to stop drones," Llenas reported. "Particularly of concern is the ability to stop a swarm of hundreds of drones."

He added that it's not just the military, though, as prisons, stadiums and airports have expressed interest in this technology.

"The problem is regulations," Llenas said. "About the only people that are able to ... use this technology to shoot down or take control of a drone is the federal government."

Watch Llenas' report above, and check out these Louisiana deputies using a drone and thermal imaging to track teen runaways.

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