There is no way the FBI or any government agency could figure out what a lone wolf terrorist was going to do. Some terrorist could walk into anywhere and just start shooting the place up. It's terrible what the United States has become. The only way I see to limit terrorism is to try and limit immigration into the country, but even that doesn't solve things. Seems like if you don't live the right kind of life to someone, whether it's being gay etc., then somebody tries to hurt you. It's terrible.