> Is it really possible we only have <5 terror plots against our country in a given year
That depends on your definition. If you're talking about organized 9/11 style attacks, absolutely. It's hard to bring plans like that together no matter how strong your convictions. If you're talking "random mentally ill person unleashes devastation on a group of US citizens" then no, there's certainly far more. That said, situations like that are best handled by local authorities. The Stoneman Douglas High School shooting is a prime example of that because as the story unraveled it became clear that the shooter had a history that was well known to the local police (and FBI if I recall?).
That depends on your definition. If you're talking about organized 9/11 style attacks, absolutely. It's hard to bring plans like that together no matter how strong your convictions. If you're talking "random mentally ill person unleashes devastation on a group of US citizens" then no, there's certainly far more. That said, situations like that are best handled by local authorities. The Stoneman Douglas High School shooting is a prime example of that because as the story unraveled it became clear that the shooter had a history that was well known to the local police (and FBI if I recall?).