WASHINGTON, D.C. There is an interesting link between Tuesday s Virginia earthquake and the February 2001 Nisqually quake in Western Washington.

Doug Church with the National Air Traffic Controllers Association says the only thing that fell and broke at the NATCA building in Washington, D.C. was a piece of glass from the old Sea-Tac tower that was damaged in the Nisqually quake.

The association s Sea-Tac members gave the D.C. staff the chunk of glass after the Nisqually quake, Church said.

Tuesday s 5.8 quake forced evacuations of all the memorials and monuments on the National Mall in Washington and rattled nerves from South Carolina to Martha's Vineyard, the Massachusetts island where President Barack Obama is vacationing.

Officials said the earthquake was half a mile deep and centered near Louisa, Va.

The federal agency says more than 12 million people live close enough to the quake's epicenter to feel shaking.

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