 Dwight D. Eisenhower's 1953 parade included about 22,000 service men and women and 5,000 civilians, which included 50 state and organization floats costing $100,000.There were also 65 musical units, 350 horses, 3 elephants, an Alaskan dog team, and the 280-millimeter atomic cannon.In 1977, Jimmy Carter became the first president to set out by foot for more than a mile on the route to the White House.