Yesterday, a grand jury decided not to indict Officer Darren Wilson in the shooting death of unarmed back teenager Michael Brown. The decision was made in the morning but not announced until 8pm, presumably to encourage would-be protestors toward sleep. That did not work. The National Guard protected the local police station, freeing police officers to disperse protests and then quell riots. From the White House, President Obama called for calm. “First and foremost, we are a nation built on the rule of law,” he said. “And so we need to accept that this decision was the grand jury’s to make.” Meanwhile, at Five Thirty-Eight, Nate Silver observed that of the 162,000 cases that went before federal grand juries in 2010, only 11 declined indictments.