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Re:The cave divers who went back for their friends by retube on Monday May 09, 2016 @11:19AM (#11660460)
They wanted to recover for 2 reasons:

1) Speed up post-death admin (insurance etc) 2) Unblock the route for future use, they did not want to see the system closed.

Re:The cave divers who went back for their friends by lostlogin on Monday May 09, 2016 @11:22AM (#11660488)
Those are the practical reasons - there are numerous mentions of a culture of "leaving no one behind".