by John Ydstie
Dec 27, 2013 (All Things Considered) — The U.S. may or may not have achieved energy independence in 2013. There is much debate about what that phrase means and when it might (or already did) happen. But the year just passed will definitely be remembered as a time when oil and natural gas markets started changing quickly and perceptions about America's role in world energy markets changed as well.
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