As America's teach districts strug...

As America's teach districts struggle to save deteriorating buildings and make expanse for rising enrollments, the stark issue of security is shaping design and construction decisions like not before.

During the '50 and '60 -- when the last large spate of drill construction occurred -- land value, availability and preciousness drove design decisions. strength efficiency played a big part in the '70 still this is a less innocent age, with violence in teachs reaching epidemic proportions.

Consider the statistics. The nation's 84000 instructs fall prey to 3 million incidents of