It's very hard to visualize quantities of money on the order of magnitude that our government spends it. Our brains have a hard time visualizing the difference between $50 billion and $500 billion.
Someone decided to make a nice image that puts the budget in relative scale so you can see how much we spend on different things.
As much as folks (especially Republicans) insist on cutting government spending to shrink government, I hope they notice that over 2/3 of our government spending is on military / national security. Yet, our military spending is increasing while we're running a ridiculously big deficit?
Eisenhower (a Republican, if you'll note) warned us of the military-industrial complex. I wish the Republican Party would look to guys like him for some advice.