The United States is battling the Islamic State on two fields. The physical one where the Air Force is dropping bombs, and the Internet, where the battle is for minds. The Islamic State is using the mainstream sites Twitter and YouTube to recruit jihadists and build support for its cause. The U.S. and its allies, meanwhile, seem to lag behind. What's the U.S. doing to combat the Islamic State's online presence? And what should it be doing? James K. Glassman is a visiting fellow at the American Enterprise Institute. He joined the Federal Drive with Tom Temin to offer some advice on how the U.S. can better respond.