dan emmitt was an agent for 21 years serving under presidents bushes and present and now dan takes ushe service with his new book "within arm's length, a secret service agent's definitive inside account of protecting the president." a firsthand look of what it's like to protect an american president out tomorrow. dan, thanks so much for coming on the program. the first thing i want to ask you is i've heard very opinions from different agents i've spoken to and people in security. what would be -- cause you more anxiety, a preplanned event that the president would appear or something spontaneous, like when president obama walked around the washington monument a few weeks ago and improv experience he had at starbucks today. >> either really. any time you take him out of the confines of the white house and into the public is dangerous. bad guys don't know you're going to be there, and a planned event they know well ahead of time when the president is going to arrive, essentially what his sequence of events are going to be. so in many cases the off-the-record movement really is the friend