And now the conclusion of Critical Mass:

With terrorists wreaking havoc in two major American cities, and the possibility of more terror attacks, the Dragonslayers are finally unleashed to go after them. They manage to chase down the terrorists responsible for the carnage, bringing them to justice. The President wants retribution for the over eight million lives lost. He wants ISIL destroyed. Rather than sending thousands of troops to fight a war, the President decides on surgical strikes at the heart of ISIL's territory.
Meanwhile, Eagle discovers Colonel Remington has been dabbling in something far more sinister than anyone could have imagined. To test his theory will require a human sacrifice. But his research proves to be key in waging the war on terror. It also possesses the ability to wipe out the human race if it falls into the wrong hands.
Admiral Connors delivers the news to the team, and Eagle convinces him to let them launch a series of attacks. She doesn't, however, tell him exactly how the war will be won. The admiral is skeptical, but lets them proceed. Three months later, the team spools up and deploys with their deadly cargo. They meet up with a Peshmerga unit in Iraq, and together, they take the fight to ISIL.