TODAY 8a: Bodycam footage reveals heroic actions. Walking through daily step goals. America’s great snack attack. Journey toward a “Life Worth Living.”

<p>New details in the Nashville school shooting as body camera footage reveals heroic actions. Also, Dr. Jordan Metzl breaks down the facts about how many steps you need to take each day. Plus, a close look at how America’s eating habits are changing and the impact on the food industry. And, Maria Shriver gets to sit down with Miroslav Volf a Yale professor to talk about his book “Life worth Living.”</p>