Keep telling your self that...
Sandy Hook Elementary School shooting - Wikipedia, the free encyclopedia
"At about 9:35 a.m., using his mother's Bushmaster XM-15 rifle, Lanza shot his way through a locked glass door at the front of the school.[19][20] He was wearing black military-style gear, including a bulletproof vest and mask.[21][22] Some of those present reported that initial shots were heard on the school intercom system, which was being used for morning announcements."
Connecticut Shooter Adam Lanza's Guns Were Registered To Mother Nancy Lanza: Official
The Denver Post Online - Columbine - Tragedy and Recovery
"The guns of Columbine were old and new. They were manufactured in three states, promoted by catalog and telemarketer, sold at small gun stores and large gun shows. But in the end, all four were sold anonymously to teenagers, no questions asked, no background checks, no purchase forms, no signatures.
Klebold's TEC-DC9 was a heavy, awkward handgun built to fire dozens of bullets in seconds, advertised as fingerprint-resistant and sold, according to one criminal-justice expert, to people with a remarkable propensity for killing."