NOEL KING, HOST:
All right. You know how we set our clocks ahead in March, springing forward, as they say? But does that mean we started or ended daylight saving time? Let s ask an expert.
(SOUNDBITE OF FILM, BACK TO THE FUTURE, PART II )
CHRISTOPHER LLOYD: (As Doc Brown) The time continuum has been disrupted, resulting in this alternate reality.
STEVE INSKEEP, HOST:
Wait. Wait. Wait - not that expert, not Doc Brown from Back To The Future. Let s go to a real-life time machine keeper.
DEMETRIOS MATSAKIS: My name is Dr. Demetrios Matsakis. I worked for 40 years at the U.S. Naval Observatory, most of that in timekeeping.
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