Its possible to find an explanation of this situation on liddyletter.com
Reporters Subpoenaed in CIA Leak (Excerpted with link below)
By Susan Schmidt
Washington Post Staff Writer
Saturday, May 22, 2004; Page A11
Journalists at Time magazine and NBC News were subpoenaed yesterday to appear before a federal grand jury investigating whether administration officials illegally leaked the name of an undercover CIA officer last summer.
Tim Russert, host of NBC's "Meet the Press," and Time reporter Matthew Cooper were subpoenaed by special prosecutor Patrick J. Fitzgerald. NBC said in a statement that it would fight the subpoena, as did a lawyer for Time.
"Time Inc.'s policy is to protect confidential sources," said Robin Bierstedt, deputy general counsel for the magazine.
Bierstedt said the prosecutors asked Time a week ago to cooperate but the magazine declined to do so. She said Fitzgerald wants to question Cooper about a story that appeared in Time on July 21, 2003, and another that ran on Time's Web site on July 17.
SNIP
Under federal law, it is a crime to reveal a covert officer's identity if it is done with the intention of exposing the officer's undercover status.
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http://www.washingtonpost.com/wp-dyn/articles/A46823-2004May21.html