Local singer Rico Lavelle belted out “The Star-Spangled Banner” before the Detroit Lions’ home game against the Atlanta Falcons at Ford Field on Sunday, then paused for a moment between the final words “home of the” and “brave.” In that second, he dropped to his right knee and raised his left hand in a fist — reminiscent of the defiant black-power salute of US Olympic track stars John Carlos and Tommie Smith at the 1968 Games to protest racism. After belting out the final note, Lavelle lowered his lead and lifted his right hand — with the microphone — in...