He has competed in two consecutive Paralympics , Athens in 2004 and Beijing in 2008 , two world games and numerous world team cups .
Poppen received his bachelor 's degree , and subsequently his substitute teaching certificate , but is most widely known as an athlete .
Poppen has competed in two consecutive Paralympics , Athens in 2004 and Beijing in 2008 , two world games and numerous world team cups .
Poppen received his bachelor 's degree , and subsequently his substitute teaching certificate , but is most widely known as an athlete .