Since the terrorist attacks of 9/11 it has been America’s security policy to avoid having the president and vice president travel together. It was therefore unusual that the president and vice president flew together on Air Force One to Atlanta last week. The fact that the two of them traveled together raises questions about Biden’s future as President. Even before 9/11, presidents and vice presidents avoided traveling together. Going back to the Kennedy presidency, in the infamous trip to Dallas, Texas on Nov. 22, 1963, Vice President Johnson flew to Texas on Air Force Two while President Kennedy and his team traveled on Air Force One. (After the assassination, Johnson returned to Washington on Air force One and, in fact, was sworn in while onboard.) On 9/11 both the president and vice president were moved to separate locations while New York and the Capitol were under attack. This was not …