A month after a gunman walked unobstructed into a Texas elementary school and killed 21 people, grief has given way to anger as an investigation reveals that the mass tragedy at Robb Elementary School could have been prevented or at the very least minimized. Parents want to know why Salvador Ramos was able to walk into the school without encountering a locked door and why police waited more than an hour to engage the shooter. Residents want to know why he was able to obtain a powerful assault weapon so soon after turning 18 and whether more could have been done to flag him as a potential threat. read more https://www.nbcnews.com/news/us-new...l-massacre-probe-reveals-numerous-f-rcna35045
