Thunder Phobia

I know many of you are aware of Liam's thunder phobia. He starts to quiver & pant before we even realize there is a storm coming. He also wants to be close; so close that he will jump on our laps & he's no lightweight. We recently noticed Liam having these attacks nearly every morning for the past week, but we haven't had any thunder storms. Well, we finally figured it out - the jets at the air force base do their practice runs every morning. They fly so high we don't even hear them, but Liam can. Mystery solved, but reaction remains.