Louisiana protesters demand justice for black man, Alton Sterling, shot by police

Dozens of protesters in Louisiana on Tuesday chanted slogans and held up signs demanding justice for a black man fatally shot in an altercation with two police officers hours earlier The shooting comes at a time of fierce national debate and heightened scrutiny over the use of excessive force by police and heightened scrutiny over the use of excessive force by police especially against black men, in major U.S. cities