It's name denotes the most bureaucratic of bureaucracies: The Office of Personnel Management. It isn't a household name, like the CIA or the FBI, nor is it a flashy explorer like NASA, but it's responsible for the operation of everything, taking care of people that staff government. Earlier this month, OPM revealed that the records of up to 4 million federal employees were compromised. Today, a union representing for federal workers said that the scope of the hack is far greater than previously reported, affecting up to one million former employees as well. Further, the hackers may have grabbed their victims' Social Security numbers.