Petty Officer 3rd Class Nick Bean, Electrician's Mate assigned to Coast Guard Aids to Navigation Team San Francisco, conducts maintenance procedures for the backup battery at Alcatraz Lighthouse in San Francisco, Thursday, Jan. 14, 2015. ANT San Francisco members are charged with maintaining the structure and the navigational light for the lighthouse. (Coast Guard photo by Petty Officer 3rd Class Loumania Stewart)
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