"Hackers gained access to sensitive information, including Social Security numbers, for 134,386 current and former U.S. sailors, the U.S. Navy has said. According to Reuters:
It said a laptop used by a Hewlett Packard Enterprise Services employee working on a U.S. Navy contract was hacked. Hewlett Packard informed the Navy of the breach on Oct. 27 and the affected sailors will be notified in the coming weeks, the Navy said. "The Navy takes this incident extremely seriously - this is a matter of trust for our sailors," Chief of Naval Personnel Vice Admiral Robert Burke said in a statement. 

Why did any single contractors PC have such a payload of information on it?