With its headquarters in Colorado Springs, Colorado, USA Boxing sponsors a variety of programs from developing the sport and its athletes at the local, regional and national levels, to sponsoring national and international competitions and selecting teams for international events, including the Olympic Games, World Championships and Pan American Games. USA Boxing sponsors four national championships annually—the U. Junior Olympic National Championships—as well as numerous domestic and international competitions. National Championships determine the annual ranking for the top four athletes in each weight class. USA Boxing also hosts a ringside physician certification clinic in conjunction with Nationals and training seminars for physicians. Young boxers get their start in amateur boxing through the Junior Olympics, a developmental program for boxers aged 8 to 16 years old. The Junior Olympic program features local, state and regional championships, culminating with the U.