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A number of key features are only available to registered users. They include:

Access to the full content of top-rated material (only teasers are available to anonymous users after the material has been posted for 45 days)
The ability to search site content
The ability to access reviews of books relevant to site material
The ability to access key quotes relevant to site material
The ability to access content from partner sites
The ability to rate material
The ability to post comments
The ability to post new information and propose it for publication
The ability to request email notification when selected content is added or updated

Only a software problem

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Submitted by Bryan Pflug on Sun, 01/28/2007 - 09:42

The root cause was a small programming error, missed during ground tests because the checks were done at a time when the sensor was wired wrong. Although technicians later repaired the sensor wiring, it didn't occur to anyone that the tests had to be redone afterward.

— Jame R. Chiles

Inviting Disaster

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Only a software problem