A bipartisan group of national security and budget experts convened by the Stimson Center estimated in a new report on May 16 that the cumulative tally is at least $2.8 trillion, and that the annual spending rate — while less than it used to be — still amounts to about 15 percent of the nation’s discretionary budget. The pace has slowed since 2008, when counterterrorism expenditures by the State, Defense, Homeland Security and other federal departments reached an estimated $260 billion — or 277 percent more than the rate in 2002, the report said. In 2017, that annual spending rate stood around $175 billion.
— source publicintegrity.org