"Hypersonic missiles – we have hypersonic and hydrosonic. You know what hydrosonic is? Water!"
— Donald J. Trump, December 5, 2020
At a rally in Georgia tonight, Donald J. Trump boasted of America's military strength, and specifically of our hydrosonic missiles.
There are no such missiles.
There is a "Hydrosonic" brand toothbrush.
It's a decent electric toothbrush.
It is not a missile.