Aerial show this morning

There was an aerial show over our garden this morning.  It was like six mini-fighter jets doing an air show.  Sleek white and metallic blue bodies swooping back and forth chasing one another at high speed, too fast to catch on video.  Once in a while one of them would swoop to block the entrance of the nest box.  I suspect that’s a male Tree Swallow from last year defending his home and his territory.  Let the photos tell the story.