are easy to implement and low cost like identifying and clearing space for what they call hard corners. hiding spots in classrooms that are out of the line of sight for anyone looking through windows and doorways. during one of the hearings they said the investigation montgomeried it was likely one -- investigation said it was likely one of the students died because she was nudged out of a hard corner. there's a code-red alarm system with the ability for all employees to declare and lock down the school. they recommended a single point of enry and exit, something that marjorie stoneman douglas high school has done when they started school this august. they wrote about installing fencing around perimeters high enough to prevent climbing, considering metal detection d de-- detectors, and viewing what's happening in realtime. at one point they thought the shooter was on the third floor