The New America Foundation’s National Security Studies Program held a conversation with Josh Meyer about his new book, The Hunt for KSM: Inside the Pursuit and Takedown of the Real 9/11 Mastermind, Khalid Sheikh Mohammed, a riveting account of the United States’ ill-fated, decade-long effort to track down Mohammed both before and after the attacks, and what it means for the upcoming prosecution of him and four others in a military commission at Guantanamo Bay, Cuba.