Presidents have invited other world leaders to travel with them on Air Force One at times, including Nixon inviting Soviet general secretary Leonid Brezhnev to travel with him to California from Washington, D.C. in June 1973.[51] In 1983, President Reagan and Queen Elizabeth II toured the US West Coast aboard Air Force One.[52] In March 2012, President Obama took British prime minister David Cameron to a basketball game in Ohio aboard Air Force One.[53]