A gun jam stopped a planned massacre that used a 100-bullet magazine

Evidence

Recall that the killing power of firearms is heightened by enlarged ammunition clips and semiautomatic firing. The Aurora gunman used a semiautomatic rifle equipped with a 100-bullet magazine. Countless lives were spared because his gun jammed partway through his planned massacre. The governor used the alleged inevitability of mass killings by other means as a justification for exempting firearms from regulatory consideration. — Albert Bandura, Moral Disengagement, 1142