A five-day waiting period to acquire a firearm would not have altered their plan. They had the tools and time to modify the shotguns into a more lethal form. A trigger lock would be irrelevant. It's hard to believe that a pair as bright, motivated and organized as Dylan Klebold and Eric Harris would be stopped by such restrictions. The Littleton coverage brought back frightful memories of the PLO attacks in Israel.
Schools make very attractive targets for deranged domestic gunmen as well as foreign terrorists.
Experts in terrorism have argued for decades that media coverage spurs yet more terrorist incidents, but there is a buck to be made. The worst of a series of PLO attacks in 1974 took place in Ma'alot, Israel. Nearly 100 kids and their teachers were taken hostage. During the rescue attempt, the gunmen sprayed machine-gun fire and detonated explosives, resulting in 25 dead and 66 wounded. After this, a debate broke out in Israel regarding guns and self-defense.