Trayvon Martin's Parents Seek Changes to 'Stand Your Ground' Laws

The parents of Trayvon Martin have launched a campaign to change the "stand your ground" law being used as a defense by the man who killed their son in February. Trayvon Martin was unarmed when he was shot and killed by George Zimmerman, a Sanford, Fla., neighborhood watch volunteer who said he killed the 17-year-old on lawful grounds. The law allows people to use force in self-defense when they perceive a threat without first having to try to flee the threat. Tracy Martin and Sybrina Fulton...Full Story