When Muhammad Ali was growing up, he experienced racial prejudice and discrimination firsthand. This was said to be one of his contribution to the early passion for boxing. At age 12, his bike was stolen and he admitted to a police who was also a young boxer's trainer, Joe Martin that he would want to beat up the thief. Martin told him that he better learn how to fight before challenging people and in turn he joined him at the local gym to be trained. Visit http://www.biography.com/people/muhammad-ali-9181165 for details.