In this July 24, 1967 file photo, a Michigan State police officer searches a youth on Detroit's 12th Street where looting was still in progress after the previous day's rioting. The July 23, 1967 raid of an illegal after-hour’s club, though, was just the spark. Many in the community blamed frustrations blacks felt toward the mostly white police, and city policies that pushed families into aging and over-crowded neighborhoods. (Photo by AP Photo)
