Check out our time lapse video of the workers inspecting the Washington Monument on Wednesday.
Engineers are rappelling down the Washington Monument in a daredevil exterior inspection of damage from last month's earthquake.
The team of two men and two women climbed through windows of the monument's observation deck and a hatch near the top to start their work shortly after noon.
They used ropes and harnesses to climb up and then rappel down the uppermost portion of the monument, known as the pyramidion, where they were inspecting each individual stone for damage.
The top is where there's a large crack and where they're expecting to find the most damage.
It will take them several days to climb up and down the monument to check each stone for cracks, chips and other damage caused by the 5.8-magnitude quake that shook the nation's capital Aug. 23.
Engineers harnessed to ropes inspect the exterior of the earthquake-damaged Washington Monument on Wednesday, September 28, 2011.
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