Since the killing of Michael Brown in Ferguson, legislators in almost every state have proposed changes to the way police interact with the public. The result: Twenty-four states have passed at least 40 new measures addressing such things as officer-worn cameras, training about racial bias, independent investigations when police use force and new limits on the flow of surplus military equipment to local law enforcement agencies, according to an analysis by The Associated Press. Despite all that action, far more proposals have stalled or failed, the AP review found. And few states have done anything to change their laws on when police are justified to use deadly force. National civil rights leaders praised the steps taken by states but said they aren't enough to solve the racial tensions and economic disparities that have fueled protests in Ferguson, Baltimore, New York and elsewhere following instances in which people died in police custody or shootings.