4.55pm: Former Secret Service agent Dan Emmett has a new book out, "Within Arm's Length," about what it's like to be a president's first and last line of defense. The most harrowing moments of his career, Emmett tells ABC News' Jake Tapper, were when President Clinton would go jogging around Capitol Hill.
President Clinton was the first president to run on a regular basis, and he was the first one to run in the open public areas... It was not uncommon, three days, four days of the week to come out of the White House during morning rush hour and take President Clinton for a run up Pennsylvania Avenue, or over at the Reflecting Pool or perhaps over at the Mall. ...
We were definitely an attack waiting to happen.