Is ISIS Making Empty Threats to Attack the US?

ISIS has released a third video in three days threatening to attack inside the United States.

The latest video threatens to turn the White House 'black' with fire. Previous videos promised to bring terror attacks to New York City and Washington, D.C.

Security officials say there's no evidence of specific plots or targets, but they're still stepping up security.

Meanwhile, there are still broader signs that terrorists are plotting within the U.S. FBI Director James Comey has admitted there are 900 ongoing terror investigations.

Fred Fleitz, vice president at the Center for Security Policy, says that Syrian refugees coming to the U.S. are a serious cause for concern. But he says he's even more concerned about America's porous borders.

For example, the International Business Times reports that six men from Pakistan and Afghanistan were just captured by U.S. Border Patrol agents in Arizona after entering the U.S. illegally through Mexico. And Breitbart reports eight Syrians were also detained after trying to enter Texas illegally.

Fred Fleitz shares his thoughts about the rising terrorism threats in the wake of the Paris attacks and the big piece of the puzzle he says the Obama administration is missing. Click play to watch.