President Obama has announced several rounds of economic sanctions on Moscow, acting with European allies. Here are answers to some simple questions about sanction specifics.
South Stream, a proposed pipeline to bring Russian natural gas to southeastern Europe, threatens to undermine Europe's solidarity forged during the Ukraine crisis. Some see the pipeline as a necessary alternate supply of gas while others say it will only give Russia more leverage over European energy.
North Dakota Gov. Jack Dalrymple wants to expand his state's oil pipeline capacity, after the state's oil production reached the 1 million barrels per day mark. But, many worry about the potential environmental consequences such as oil spills.
Although North Dakota, Texas, and the Gulf of Mexico are known for producing much of the US's oil, other states are becoming bigger producers. Alaska and California are two states that are gaining footing in the oil industry.