When workers began excavating a new parking garage in Rome, they discovered what archeologists say was once Emperor Caligula's "pleasure gardens." Anderson Cooper reports on the find and the scholarly re-examination of Caligula's legacy.
First, a report on a dad's mission to uncover brain injuries after his Navy SEAL son's suicide. Then, a look at the California wildfires cleanup challenges. And, inside the dangerous Indian Relay horse race.
