"Ultimately it's how we choose to treat one another and how we love one another," President Obama said about the shooting in a Colorado movie theater. "It's what we do on a daily basis to give our lives meaning and to give our lives purpose. That's what matters. At the end of the day, what we'll remember will be those we loved and what we did for others. That's why we're here. I'm sure that many of you who are parents here have the same reaction that I did when I heard this news. My daughters go to the movies....