Texas schoolchildren begged for help with officers waiting outside. Be very mad about that.

Outside, police officers in a small Texas community stood guard believing that things were safe inside the school. They believed they had a barricade situation and were no longer responding to an active shooter. 

Inside, meanwhile, children were calling 911 begging for help. They were still being killed. The shooting was still going on. It wasn't over. 

So why and how did a communication breakdown of this deadly proportion happen? How could 19 children and two teachers get gunned down while officers were right outside, waiting? 

The answer to that has been evolving, wrapped in the same miscommunication that days later has left us angry and deflated following America’s latest school shooting.