how to melt bottles for art display?
The blanket must be soaked and when you use it, you smother the item that is on fire. The idea is to deprive the flames of oxygen.
Actually in many schools in the US do have security guard. In fact they often have police hire for security. This allows the officer to be armed and make an arrest on the spot. It is not a requirement but some do provide this. Some school even go as far as having metal detectors. But having these things in place will not completely prevent these types of crimes. But it will reduce the likelihood of thing like this. I personally know a young man that attended a school that has armed security and metal detectors at every entrance. Somehow he brought a gun to school. He did this often before he finally got caught with the gun in the school. I don't recall if it was once or twice he was caught before the school kicked him out. Then he ended up in my school district.
Apparently there was a controlled access into the school, a place described in news reports as one of the safest in the US (why then do they need controlled access?). News reports state he pressed a button and was let in. Maybe thats all crap, I am sure we will know in the comming weeks/months what happened. While ever Americans place such sanctity in gun ownership their children will be at risk. Shame they now need to talk of schools in terms of green zones and red zones.
Middle schools and high schools do have cops.
Schools in US do have security guards for access control. Some hire armed security guards and some hire unarmed security guards. It completely depends on the environment of the school.
