Even though they are frequently seen flanking presidential convoys in their trademark dark suits and sunglasses, little is truly known about the insulated world of the United States Secret Service. National Geographic's Inside series delves deep into the inner workings of the secretive organization for an unprecedented behind-the-scenes look at the upper echelons of national security.
John Benjamin Hickey
Barbara Bush
George H. W. Bush
George W. Bush
Laura Bush
Gerald Ford
Jimmy Carter
Rosalynn Carter
Dick Cheney
Bill Clinton