Navy Submarines are So Tough Even Crashing Into a 'Mountain' Can't Sink Them
What You Need to Know: The USS San Francisco (SSN-711) is a Los Angeles-class nuclear-powered fast attack submarine commissioned in 1981. In 2005, while submerged near Guam, it collided with an uncharted undersea mountain, resulting in the death of one sailor and injuries to 97 crew members.
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