How many people serve in the President of the United State’s Secret Service detail while he or she is away from the White House?

The President of the United States is protected by an elite branch of Homeland Security's Office of Protective Operations Department called The Secret Service. According to The Secret Service Website, there are approximately 6,500 personnel, 4,500 of whom are officers.  In addition to protecting the President, they are enlisted with investigating counterfeit currency, protecting presidential candidates, and escorting foreign dignitaries during high-profile visits to the United States.

When the President travels by vehicle, they travel in a formal configuration of protective vehicles called a motorcade.  In this configuration, the Secret Service detail travels in one halfback black sport utility vehicle immediately behind the Presidential Coach and Spare.  There are sixteen essential vehicles in the motorcade.  However, this does not include the local police vehicles, such as motorcycle escorts, who accompany the motorcade when traveling outside of Washington, D.C.