Prologue On the evening of March 30, 1981, an eight-year-old boy in Norfolk, Virginia, sat glued to his family's living room TV. Earlier that day, John Hinckley, Jr., had attempted to assassinate Ronald Reagan outside the Washington Hilton. But as CBS News played the scene in a slow-motion loop, the boy's focus wasn't on the president. It was on the man who entered the frame. Over and over again, the boy watched in amazement as this square-jawed man in a light gray suit turned toward the gunfire and fell to the ground, clutching his stomach. By taking a bullet for the president, the newsman said, Tim McCarthy probably saved his life. At that moment, young Brad Gable (not his real name) knew exactly what he wanted to do when he grew up: He would be a Secret Service agent. Now, thirty years later, Gable had indeed fulfilled that mission. He was a member of the Secret Service's Counter Assault Team, or CAT. In the constellation of presidential protection, CAT arguably has the most dangerous assignment. When most people think of the Secret Service, they picture the suited agents who cover and evacuate the president in moments of danger. The heavily armed CAT force has a different mission: Run toward whatever gunfire or explosion threatens the president and neutralize it. The team's credo reflects the only two fates they believe await any attacker who crosses them: "Dead or Arrested." Gable was proud of the career he had chosen. Among his colleagues, he was respected for the pure patriotism driving him and for his intense focus on operational details. So why, in the late summer of 2012, as he sat in a restaurant near Fort Bragg, North Carolina, did he suddenly feel like throwing up? Gable and his fellow agents had come to a mom-and-pop restaurant with a group of Delta Force members who were overseeing the CAT team's annual training. Gable's squad had drilled for almost a week with these steely Special Forces operators, playing out mock assassination attempts and blind attacks to learn how to shield themselves and their buddies in close-quarters combat. After a dinner of ribs, steaks, and wings, Gable sat back for some beers and small talk with one of 9/11's faceless heroes, a Delta Force sergeant major I'll call John. Gable liked John's no-bullshit style. He had real battlefield experience--two weeks after the 9/11 attacks, he'd been part of the raid on Mullah Omar's Kandahar compound, but he didn't crow about it--which instantly earned Gable's trust and respect. On his second beer, Gable felt loose enough to ask John a question that had been on his mind: "After teaching so many operators and law enforcement agents, what do you think of the Secret Service's overall readiness?" The sergeant major demurred, so Gable pressed him. "Seriously, how would you rate us?" "Look," John said. "I feel sorry for you guys. The Service has really let you down. You'll never be able to stop a real attack." It wasn't the answer Gable had hoped for, and as he listened to John dissect the Service's outdated equipment and spotty training, his stomach grew queasy. Deep down, he knew how ill-equipped and out of date the Secret Service was, but hearing it articulated by someone he respected made it impossible to deny. His mind drifted to all the times he had seen the Service drop the ball--most recently, a 2010 trip to Mumbai with President Obama, in which his unit had narrowly avoided a major international incident after nearly killing an unidentified gunman who turned out to be a local police officer. Scenarios like these were dress rehearsals for a real attack on the president, and in his five years with CAT, he had seen the Service fail so many of them. Gable was now faced with a brutal truth: Increasingly, the Secret Service was fulfilling its Zero Fail mission based not on its skills, people, training, or technology, but on dumb luck. How long would it be before that luck ran out? Gable wasn't alone. He knew other dedicated agents who felt a growing sense of disillusionment, especially with the agency's leadership. But fear of repercussions had kept them silent. Until the stakes got too high. Excerpted from Zero Fail: The Rise and Fall of the Secret Service by Carol Leonnig All rights reserved by the original copyright owners. Excerpts are provided for display purposes only and may not be reproduced, reprinted or distributed without the written permission of the publisher.