Just over 1,000 National Guard members remain in Washington to protect the U.S. Capitol after their mission following a riot by Donald Trump supporters ran up a bill topping $500 million.

The $520 million National Guard presence, which surrounded the Capitol compound for months, began after the Jan. 6 riots and ended at midnight Sunday. The National Guard Bureau estimated the initial mission cost from January through March to be $410 million, and the extension until Monday cost an additional $111 million for a massive $521 million bill to protect a vast perimeter of the Capitol grounds through the winter and spring.

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