Jet activity Outside SAFB

Lately I've been seeing a lot more military vehicles fly over my house, also not in their normal trajectory and flying in formation. I assume theirs an explanation, but I've lived here for over 15 years. Going to continue to post the bizarre if you're interested. I know this one is short and you can barley see them, but you can hear them. Will post the cargo ones as well and the double bladed choppers when they fly over again. I enjoy watching planes.