National security hawks pressing social media companies to help the U.S. government's online fight against the Islamic State are adopting a new strategy: single out Twitter as the most uncooperative. That message will be on display next week in New York, where Facebook will play a prominent role in a State Department-sponsored anti-terrorism youth summit organized by a group that has harshly criticized Twitter. The group, called the Counter Extremism Project, is headed by well-known Washington players like former Sen. Joe Lieberman and Fran Townsend, a homeland security adviser to President George W. Bush. And it's keen to highlight what it sees as the differing approaches of Facebook and Twitter when it comes to fighting ISIL online.