(Martha's Vineyard, MA) -- President Obama is calling for calm after another violent night on the on the streets of a St. Louis suburb. Speaking from Martha's Vineyard today, Obama urged authorities to be transparent as they investigate the fatal police shooting of an unarmed teenager in Ferguson, Missouri. He remarked that there's never an excuse for violence against police or for vandalism and looting. The President said "now is the time for healing. Now is the time for peace and calm" in Ferguson.