Editor's note: Below is Thomas Joscelyn's testimony to the House Committee on Foreign Affairs Subcommittee on Terrorism, Nonproliferation, and Trade, on al Qaeda, the nature of the group's central command and its relationship with its affiliates, and the future challenges the West faces in battling the terror organization. Chairman Poe, Ranking Member Sherman and members of the Committee, thank you for inviting me here today to discuss the threat posed by al Qaeda. We have been asked to "examine the nature of global al Qaeda today." In particular, you asked us to answer the following questions: "What is [al...