As the title suggests, I thought it would be interesting to make a list of athletes per nation and per sport who have competed at every Olympics this century (Sydney 2000 - Rio 2016). I always have a soft spot for athletes who show grit and determination to compete at the top level across a long period of time and those athletes who have such longevity are deserving of our admiration.   The primary focus of this thread is so that we can track those athletes who are still on course