This week on "Kindness 101," where Steve Hartman and his kids share stories built around kindness and character and the people who've mastered those qualities, the lesson is on appreciation. Just in time for Mother's Day this weekend, the Hartmans will try and answer the big question — who is the world's greatest mom?
Newly obtained dash camera footage captured the moment Brown University gunman Claudio Manuel Neves Valente sauntered right across a campus parking lot mere moments after he shot and killed two studen...