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U.S. is targeting ISIS' oil installations in Syria and Iraq in an attempt to disrupt the groups' flow of oil wealth.
CNN's Lisa Sylvester reports on clean-up efforts following an major oil spill in Arkansas.
RELATED STORY: Pipeline leak brings crude reality to Arkansas
CNN's Van Jones speaks out against the proposed Keystone oil pipeline.
RELATED STORY: Not the Keystone pipeline, the 'Obama pipeline'
CNN's Dan Lothian reports on a North Dakota town where jobs are plentiful, but living quarters are scarce.
CNN's Lisa Sylvester looks into why President Obama is tapping into the country's oil reserves now.