A new report from the Interior Department says Shell failed to adequately oversee contractors who were central to its botched oil-drilling efforts in the Arctic. Shell had already announced it would not drill in the Arctic this year after mishaps on its rigs, one of which ran aground off Alaska. Interior Secretary Ken Salazar said, “Shell screwed up in 2012.” He said Shell will need to present a plan showing it is better prepared for Arctic conditions before it can resume drilling there.