$515.4 billion - Defense. OK, I'm willing to risk that the US will still be able to defend itself if we knock off $100 billion.

$145.2 billion - Global War on Terror. OK, so how much does our risk to terrorism increase if we knock off $100 billion here?

$37.6 billion - Homeland Security. OK, let's keep the US Coast Guard, but I'll gamble that eliminating TSA won't increase the risk of a US airline hijacking an iota.

I suggest these for starters while acknowledging that national security is the federal government's number one job. Having recently read that the US spends more on the defense budget than all other countries combined, it's not that hard to conclude that perhaps the military-industral complex have successfully conspired to over spend and over-extend us more than just a little bit.

Sg