Thursday marks the 30th anniversary of the Challenger Space Shuttle disaster. For those of us who remember it happening in real time, January 28, 1986 was a heartbreaking day, when we saw a disaster unfold before our eyes. And nothing -- nothing -- could erase the images from our hearts.
The Republican presidential field gathered in Las Vegas Tueday night for the final debate of 2015. They did not disappoint. Unlike previous debates (on both sides), this one provided more clarity and substance. That was made easier by the topic: national security, a traditional Republican selling point.
So how did the candidates do? Let's rewind the tape.