The EEOC and AT&T were joined in a battle over equal opportunity in the early 1970s.  Too proud to admit its failure to provide equal opportunity for the women in its workforce, AT&T was willing to share all its data and records.  AT&T's records, file after file, were provided without objection to the EEOC and thus built the case.  AT&T even renovated a floor of a building in DC to provide a place for the EEOC lawyers to review those records.  And in those files, the EEOC found documentation of just what it was trying to prove.