Indigenous people across North America are calling this week for sustained responses to the violence in their communities, much of it against women and girls. In prayer walks, self-defense classes, marches and speeches at state capitols, they are pushing for better cooperation among law enforcement agencies to find missing people and solve homicides that are among about 4,300 open FBI cases this year. Many young women are covering their mouths with bright red handprints, vowing to speak for those who have been silenced.