Drivers in the middle of the country have gotten a break on gas prices because of bargain-priced oil coming in from Canada. Monika Wisniewska/iStockphoto.com hide caption

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A cargo ship transits the Suez Canal en route from the Mediterranean Sea to the Gulf of Suez at the city of Suez, Egypt, on Wednesday. Emilio Morenatti/AP hide caption

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President Obama hugs NASA astronaut Mark Kelly, husband of Rep. Gabrielle Giffords, during a ceremony last week in Tucson, Ariz. Jewel Samad/AFP/Getty Images hide caption

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Emergency personnel work on Jan 8 at the scene where Rep. Gabrielle Giffords, (D-AZ) and others were shot outside a Safeway grocery store in Tucson, Ariz. Nearly anyone at the scene that day will be at risk for post traumatic stress disorder, but it's difficult to predict who will be affected. Matt York/AP hide caption

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