The US intel community has added major real estate since 9/11

WASHINGTON - JANUARY 08: The Department of Homeland Security main office is shown January 8, 2010 in Washington, DC. U.S. President Barack Obama has ordered DHS to "aggressively pursue" advanced screening technology and to fix gaps in the way intelligence is distributed, analyzed and compared to watch lists used to identify potential threats against the U.S. (Photo by Win McNamee/Getty Images)

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WASHINGTON - JANUARY 08: The Department of Homeland Security main office is shown January 8, 2010 in Washington, DC. U.S. President Barack Obama has ordered DHS to "aggressively pursue" advanced screening technology and to fix gaps in the way intelligence is distributed, analyzed and compared to watch lists used to identify potential threats against the U.S. (Photo by Win McNamee/Getty Images)

After 9/11, the U.S. intelligence community swelled.

More than 33 top-secret intelligence buildings were built or being built over the next nine years.

That's about 17 million square feet just in and around Washington, D.C.

For perspective, that's basically 15 White Housesseven U.S. Capitol Buildings and three Pentagons combined.

And those numbers are just from 2010. Since then, even more office space has been added just to house the intelligence community.

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