[In a telephone interview, Mr. Woodward said he had apologized to Mr. Downie for not disclosing his own part in such a long-running story long ago and said he had kept a deliberately low profile to protect his sources.] The terms of engagement change when a reporter and reporters are being subpoenaed, agreeing to testify, being forced to testify, being jailed, ... That's the new element in this. And what it did, it caused me to become even more secretive about sources, and to protect them. I couldn't do my job if I couldn't protect them. And to really make sure that I don't become part of this process, but not to be less aggressive in reporting the news. Bob Woodward