In a must read decision, the Court imposed sanctions (costs and attorney fees) under Rule 26(g) and Rule 37 for the failure of a party to properly preserve backup tapes and check other ESI storage locations. Counsel for Delta "represented to the Court approximately twenty times that it had produced every document responsive to Plaintiffs' discovery requests that it had in its possession." Yet, subsequent discovery found approximately 60,000 additional documents that had not been disclosed that were "found on the previously un-checked individual hard drives, and . . . documents located on recently discovered back-up tapes." In re Delta/AirTran Baggage Fee Antitrust Litig., 2012 U.S. Dist. LEXIS 13462, 9-10 (N.D. Ga. Feb. 3, 2012).