What started as a simple adventure to see the beauty of the U.S. has turned into a 12,000-mile trek across all 50 states for the duo known as the “Walking America Couple.” But even with all the sites, the couple says it’s the people they’ve met along the way who have left the biggest mark on their lives. “We’re seeking to change people within, and that will eventually result in the change outside we’re all hoping for.” | CBS Evening News