The Games have grown so much that nearly every nation is now represented . This growth has created numerous challenges and controversies , including boycotts , doping , bribery , and a terrorist attack in 1972 . Every two years the Olympics and its media exposure provide athletes with the chance to attain national and sometimes international fame . The Games also constitute an opportunity for the host city and country to showcase themselves to the world
terrorist attack in 1972
Munich massacre
Olympic Games