Sen. Joe Lieberman appears at the Republican National Convention in St. Paul, Minn., in 2008, just eight years after he was the Democratic vice presidential nominee. His appearance is just one of several notable oddities at recent political conventions. Charles Rex Arbogast/AP hide caption

itoggle caption Charles Rex Arbogast/AP

Staff Sgt. Jesse Parker (left) and Airman 1st Class Alisha Burns, 644th Combat Communications Squadron, work together to paint the Daniel L. Perez Elementary School. Sr. Airman Benjamin Wiseman/Courtesy of U.S. Air Force hide caption

itoggle caption Sr. Airman Benjamin Wiseman/Courtesy of U.S. Air Force

Lance Armstrong speaks to the media after the February 2011 Xterra Nationals triathlon. On Friday, the cyclist said he would no longer fight doping allegations. Jim Urquhart/AP hide caption

itoggle caption Jim Urquhart/AP