My latest at the National Interest takes a look at the development of hyper-sonic weapons:
The United States is building hypersonics for two reasons. First, we want to kill people fast, without the messy danger of a global thermonuclear war. Second, we want to be able to punch through the defensive systems of peer competitors.
Unfortunately, these two justifications contradict one another. Given that China, Russia and even India appear on their way to similar systems, we should take care before letting the technology outpace the politics.