Associated Press
In this photo taken Wednesday April 25, 2012, Capt. Bruce A. Horton, president of the San Francisco Bar Pilots, watches as a tanker passes beneath the Golden Gate Bridge in San Francisco. Since the days of Mark Twain, the pilots have had it good. Thanks to political clout and highly specialized training, this cadre of 60 ship captains has for more than a century had control over guiding oil tankers and cargo ships in, out and around the San Francisco Bay.  (AP Photo/Eric Risberg)

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