WASHINGTON (CNN) - One day after focusing on lost e-mails at the IRS, the House Oversight Committee learned Wednesday that the Environmental Protection Agency is also having trouble recovering e-mails the committee wants as part of a separate investigation.

McCarthy: "There is a challenge"     

EPA Administrator Gina McCarthy told the Republican-led committee that the agency cannot access some e-mails belonging to a biologist who worked on a controversial mining project assessment. It is a hard drive problem, but McCarthy was careful to not call it a "hard drive crash" or destroyed hard drive.      FULL POST