The case of the widows, and, perhaps, their heirs from the crashof the B-29 - you said it took 50 years to recover information that what was going on was a cover up of bad maintenance records.
That's a nice bonus, as long as they avoid problems of Feb. 29, 2008, when United Airlines suffered a systemwide crashof its automated check-in kiosks, forcing passengers to queue up for ticket agents.