Did they all have to die? That's the infuriating question being asked today now that its known that law enforcement waited 30 minutes to an hour before taking down the 18-year-old gunman. For loved ones of those killed, many of whom clashed with police outside the school, so far there is no satisfactory answer. And friends and family of the shooter say he had grown increasingly more confrontational and violent in recent months. Now, for the first time we are seeing inside the home where he opened fire on his grandmother before heading to the school. Plus, the deadly shooting has revived the debate over arming teachers and posting armed guards at schools. Now there are more questions prompted by this new video that shows the shooter effortlessly entering the school. And it was a miracle landing by a passenger after the pilot had a major medical emergency...now that pilot is speaking out.