Not to go completely OT, but how is it less absurd when viewed as a percentage of GDP? Viewed as such, we still spend significantly more than everybody else, except a small handful of countries that are fighting active insurgencies (Iraq, Afghanistan), the "security states" in the Persian Gulf (Oman, Saudi Arabia), and Israel (self-explanatory).
Look at the countries that are in the same ballpark and you notice a few things: states that are or recently have been involved in civil wars or insurgencies. Small states surrounded by hostile neighbors (Israel, Azerbaijan). Quite a few authoritarian states. Not really the company that you'd expect us—a liberal democracy without enemies in proximity—to be keeping.