1961 Lincoln Continental Presidential Limousine at the South Portico of the White House, 1964

A radically changed 1961 Lincoln Continental Presidential Limousine waits outside the White House in October 1964. Nearly a year before, President Kennedy was riding in the midnight-blue, unarmored, open convertible when he was assassinated. The vehicle was updated with a permanent roof, bullet-proof glass, and extensive armor-plating. It continued to serve Presidents Lyndon Johnson and Richard Nixon as front line transportation.