The 5.8-magnitude earthquake that shook the East Coast and damaged the Washington Monument enough for it to be closed indefinitely may have done more damage than the National Park Service had previously revealed. Armed with tiny hammers to test the monument’s soundness and to search for further damage, a team of engineers will be rappelling the 555-foot-tall structure over the next five days.
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The operation comes after the Park Service posted a surveillance video taken during the earthquake from the monument’s observation deck. The video shows panicked visitors running for cover as debris falls from the ceiling:
The Park Service has spent about $200,000 so far on the inspection.