Sen. Barbara Boxer: EPA is becoming a "secretive, dangerous ally of polluters."

July 28, 2008 - WASHINGTON (CNN) -- The Environmental Protection Agency advised employees last month not to answer questions from journalists, the Government Accountability Office or the agency's inspector general, according to an EPA e-mail made public Monday.

"The order reinforces a growing bunker mentality within an EPA that is the subject of a growing number of probes into political interference with agency operations," the group said.

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