Suspended by ropes, an engineer begins the process of conducting a block-by-block inspection of the Washington Monument's exterior on Tuesday.
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Cracks on the top west face of the Washington Monument on Aug. 25, two days after a 5.8 magnitude earthquake struck the East Coast. The National Park Service has closed the landmark indefinitely owing to the damage from the quake.
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A perigee moon rises next to the Washington Monument on March 19. A perigee moon is visible when the moon's orbit position is at its closest point to Earth during a full moon phase.
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In 1996, the Washington Monument Restoration Project began; it took four years and $10 million. Here, the monument is covered in project scaffolding, in 1999.
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Spectators watch the Independence Day fireworks in 1996 at the grounds of the monument.
The top of the monument and part of a U.S. flag are reflected in the sunglasses of Austin Clinton Brown, 9, who joined the civil rights March on Washington on Aug. 28, 1963. Over 200,000 demonstrators attended the rally.
Martin Luther King Jr. waves to supporters on the Mall during the March on Washington, where he later delivered his famous "I Have a Dream" speech.
Aerial view of the tidal basin in Washington, D.C., taken in 1949.
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The monument was built between 1848 and 1884 but was not officially open to the public until Oct. 9, 1888.