Nation of Islam leader Louis Farrakhan has been among the vocal voices weighing in on calls for justice for Trayvon Martin, an unarmed 17-year-old who was gunned down last month while walking home in Sanford, Florida. On Wednesday, a march was held in New York City in support of the teen’s family, as federal and local authorities launch investigations into how the incident unfolded and why the state’s “stand your ground” law applied to the shooter in this case. On Twitter yesterday and today, Farrakhan sent some curious tweets regarding peace, justice and retaliation that could be interpreted as a...