COSTELLO: A developing story out of Iraq. CNN has learned, a U.S. service member killed in action near Mosul was a Navy SEAL. That's according to a U.S. defense official. We're told the Navy SEAL was serving as an advisor to Peshmerga forces there, and got caught up in a firefight when the enemy crossed Peshmerga lines. We're talking about ISIS here. And officials say the U.S. responded by dropping more than 20 bombs. President Obama says the U.S. must be resilient and true to its values as it continues to fight the war on terrorism. The President also speaking up candidly about what the next Commander In Chief needs to be ready for. Here's some of what he told CNN's Peter Bergen.</s>BARACK OBAMA, PRESIDENT OF THE UNITED STATES: I think that we have built a incredible structure of cooperation between intelligence, military, law enforcement, that has hardened the American homeland. And the capacity of an organization like an ISIL, or an Al Qaeda, Arabian Peninsula to carry out a big catastrophic attack is much lower. But as we've seen, you now have a proliferation of groups. Because of the power of social media, there is a mechanism to recruit volunteers that are already located in the West. That are much more difficult, precisely because they don't engage in the same kind of planning. And what that means is, that we've got to continue to be vigilant. It means that we've got to go after ISIL in its core, where it allows itself to maintain the illusion that somehow, it's on the march. It's going to be important for us, ultimately, to take them out of Mosul, take them out of Braka (ph). Make sure that they don't have those kinds of safe havens where they can pretend that they're a state, in some fashion.</s>COSTELLO: The President also says the U.S. should continue to be prepared for the threat of small groups, and lone wolf attackers. I'll be right back.
Navy SEAL Killed In Iraq Assisting Peshmerga Forces