Jets over Birmingham, AL

Well I had a job interview today north of Birmingham and on the way back I saw something very odd. Flying at low altitudes over the city of Birmingham I saw three Military Jets. As I said they were flying low and in circles around the city.

It was about an hour ago at 1:00 PM Central Standard time that I saw them. I have been listening to the news and have not heard anything. Just wondering is this some kind of exercise or would there have to be a threat of some kind to prompt scrambling the jets.