Woulda, coulda, shoulda:

Penn State global warming scientist Michael E. Mann regrets he did not instantly object when a fellow climatologist asked him in 2008 to delete e-mails subject to Freedom of Information requests.

”I wish in retrospect I had told him, ‘Hey, you shouldn’t even be thinking about this,”’ Mann told The Morning Call in his first interview since the university last month launched an investigation into his conduct. ”I didn’t think it was an appropriate request.”