Backup tapes containing as many as 24,000 Lois Lerner emails were destroyed by an IRS entity officially known as the “Media Management Midnight Unit” located in Martinsburg, West Virginia, according to documentation released this week by the House Oversight Committee. In all, 422 backup tapes holding the emails were magnetically “degaussed” despite an agency-wide preservation order and congressional subpoena. Degaussing is a process whereby powerful magnets are used to erase data on a storage tape. The preservation order came from IRS Chief Technology Officer Terence Millholland in response to Congressional subpoenas over Lois Lerner’s emails. However, the agency completely failed to ensure...