U.S. calls Pensacola attack terrorism, Russian hackers targeted Ukrainian company at center of impeachment, and LSU is tops in college football.

Bruce Alexander, president of Security 1 Solutions, takes a look at the tactical parallels of mass shootings.

The war against terror isn't over. Listen as the Washington Times' Carlo Munoz tells Gordon that although Osama Bin Laden has been dead for years and Abu Bakr al-Baghdadi's "caliphate" in the Middle East has crumbled, the global jihadist threat continues to boil as extremists retreat underground to plot terror strikes around the world.

Rick Hampson from USA Today remembers the hundreds of Americans killed in mass shootings this year.

How situational awareness can save your life in a terror attack, what you need to know about holiday gift returns, and the real story of "Winter Wonderland."

Security expert Paul Viollis gives insight into the possible terror attack in Berlin and ways to prevent them going forward.

Truck rams Berlin Christmas market, leaving at least 12 dead, Trump strikes fear into defense contractors and Salvation Army donations up 61% after Cowboy Elliott jumps into red kettle.

Matthew Dalton of The Wall Street on the security concerns that continue one year after the Paris terror attacks.

Terrorism Expert Robert Caltabiano explains how authorities caught Ahmed Rahami.

Psychologist Dr. Bart Rossi analyzes the psychological make-up of a terrorist.

WSJ reporter Matt Bradley on the uphill battle the Iraqis face rebuilding Ramadi.

WSJ's Matthew Dalton gives insight into the fake passport problems in Syria.

Patrick Tucker from DefenseOne takes an interesting dive into the surprising motivations driving homegrown and international terrorists to join ISIS.

Susan Page from USA Today assesses the impact that the San Bernardino shooting will have on President Obama's agenda in his final year in the Oval Office.

The Hill's Kristina Wong with reason why progressives are nervous about Obama placing ground troops in Syria.

Terror threat has 'evolved' into a new phase, Obama says, will the Fed finally raise rates now, and Santa isn't dead; newspaper says sorry for fake obituary.

Lt. Col. Scott Mann (Ret.) breaks down reasons why the anti-terror coalition may be unsuccessful in defeating ISIS.

Colleen McCain Nelson from the Wall Street Journal joins us from Paris to discuss yesterday's developments in the push to form an anti-terror coalition against ISIS.

James Marson in Moscow for the WSJ tries to explain what's happening with the recent Russian plan explosion.

Chattanooga shootings leave four Marines, sole gunman dead, analysis of James Holmes verdict and the most unusual campaign swag.

National defense expert Tony Shaffer breaks down the recent Islamic State attacks and what they mean.

Jim Michaels of USA Today on the success Kurdish forces have had against the Islamic State.

Three attacks deepen fears about Islamic State's global reach, Pride parades supercharged by court ruling on marriage and Turner enlists Bugs Bunny, Scooby-Doo.

Susan Zalkind gives insight on how ISIS is using social media to find new members.