We're pretty excited about the upcoming HBO documentary Thank You Mr. President: Helen Thomas At The White House, which profiles journalist veteran Helen Thomas, who has been covering the White House since the Kennedy Administration. This evening, Chris Matthews got a sneak peek at the film, which premieres on August 18, as well as an interview with the film's director, Rory Kennedy. Clip above; the entire MSNBC segment, with more footage from the film, can be seen here.


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