Some mobilization going on here

So I was driving back to Tokyo from Narita Airport after dropping my mom off for her flight back to Seattle. What do I notice is different than usual?

A whole lot of US Navy vehicles and servicemen driving alongside me.

Well, not the whole way, after all, they are following the speed limits while I'm barrelling down the ToKanDo. Still, lots more military than usual making their way to Yokota, Yokosuka, Sasebo, or wherever they are stationed here.

Probably something to do with those crazy North Koreans and their missile.