52% of US Discretionary spending is devoted to the military

The world’s top 7 military spenders in 2010

The US Spends more on the military than the next 15 countries combined, and it spends 43% of the world total.

Figures from the SIPRI Yearbook 2011.

(source: http://en.wikipedia.org/wiki/List_of_countries_by_military_expenditures)