Article Photos: Heitkamp's Senate win tops ND stories for 2012 4/6

FILE - In this July 26, 2011 file photo, Austin Mitchell, left, and Ryan Lehto work on an oil derrick outside of Williston, N.D. In 2012, domestic crude oil production achieved its biggest one-year gain since 1951. North Dakota set an oil-production record for the fifth consecutive year, putting the state on pace to best the previous mark by more than 50 million barrels. The state also passed Alaska to become the second-leading oil-producing state in the nation, trailing only Texas. (AP Photo/Gregory Bull, File)