How can the govt. prevent such an event from happening again or at least attempt to prevent it from happening again?
You don't. The price of freedom is the risk of getting hurt because the bad guys are in advantage. You don't step out of your front door with a gun and shoot everybody on the street because they may rob you - you get robbed and only after that you try to catch, charge and sentence the guy.
You don't. The price of freedom is the risk of getting hurt because the bad guys are in advantage. You don't step out of your front door with a gun and shoot everybody on the street because they may rob you - you get robbed and only after that you try to catch, charge and sentence the guy.