Subscribe to Breaking News emails

You have successfully subscribed to the Breaking News email.

Subscribe today to be the first to to know about breaking news and special reports.

Manhunt underway after Houston cardiologist killed while riding bike

Renowned cardiologist Dr. Mark Hausknecht—who treated former President George H.W. Bush— was riding his bike to work when a gunman, also on a bike, opened fire on Friday.

Best of NBC News

Play All