 Complete the following phrase:  Steven López born November 9, 1978 is a Nicaraguan-born American taekwondo competitor, a 2000 and 2004 Olympic gold medalist in the -68 and -80 kg divisions, respectively and a 2008 Olympic bronze medalist again in the -80 kg division and 4th Dan in taekwondo. In 2001, he won the Lightweight Taekwondo World Championship, and in 2003 he won the Welterweight Taekwondo World Championship which he has since won in 2005, 