| http://www.w3.org/ns/prov#value | - Interior Secretary Ken Salazar??s announcement that he??s stepping down at the end of March leaves his successor to grapple with contentious issues including drilling in Arctic waters off Alaska and fracking for natural gas and oil on public lands. | 01/16/13 18:07:14 By - By Sean Cockerham and Rob Hotakainen Obama's Interior Secretary Ken Salazar heading back to Colorado
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