Same-Day Voter Registration; Anthem Protests; Baseball Pitching Regulations; Flint Water Collection

On the 21st: We heard from both sides of the debate over same-day voter registration, and talked with a sports columnist about Colin Kaepernick's national anthem protests. Plus, we spoke with a surgeon about the effects of over-pitching on high school baseball players, and learned about an effort to help residents of Flint, Michigan, get access to clean water.