TRAFFIC WAS HEAVY as we approached Philly. The Phillies were playing a doubleheader, and a bunch of rock stars had put together a Freedom Rocks concert at the Wachovia Center down near the airport. Plus an estimated half million people were descending on Center City and the Liberty Center. Overall it was supposed to be the biggest, loudest, busiest day in Philadelphia history. “Great day for travel,” Rudy grumped from the backseat. “Almost there,” Grace said as she turned off I-95 near Penn’s Landing. I’d called ahead and arranged for a pair of motorcycle cops to meet us and help us through the traffic snarls. Grace filled us in on the people we would try and interview. There were six agencies involved in various aspects of security. The two who interested us most were Robert Howell Lee, the director of special operations for an FBI/Homeland joint command; and Linden Brierly, who was the regional director of the Secret Service and the direct link between the Secret Service and its parent department of Homeland Security.