http://www.fas.org/ahead/ has been crawled 315 times going all the way back to January 17, 1997.

A crawl can be a duplicate of the last one. It happens about 25% of the time across 420,000,000 websites. FAQ
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January 1, 2010

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January 8, 2010

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January 21, 2010

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February 6, 2010

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April 8, 2010

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May
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June 10, 2010

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Aug
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Sep
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Note

This calendar view maps the number of times http://www.fas.org/ahead/ was crawled by the Wayback Machine, not how many times the site was actually updated. More info in the FAQ.