According to Gallup, the Centers for Disease Control, which is hosting today's Weight of the Nation conference on obesity, is the government agency most trusted by the American people. 61% say the CDC is doing an "excellent job." NASA and the FBI also get top marks.  The agency with the worst rep: the Federal Reserve Board, which gets 30% positive marks.  The head of the CDC, Dr. Thomas Freiden, gives the opening keynote this morning. I'll be interviewing him later in the day.

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