Would More Secure Doors Have Slowed Newtown Shooter?

Adam Lanza shot his way into Sandy Hook Elementary School by blowing holes in the school's front door. But had that door been something more sophisticated and more secure, might Lanza at least have been slowed in his attack? One company that devotes itself to just this question is Assa Abloy, an outfit based in New Haven, Conn., that says it specializes in "secure, safe and convenient door solutions."