Christian Science Monitor: News flash: Terrorists sink an oil tanker, blocking the vital Bosporus Strait. Oil rockets to $160 a barrel and gasoline to $5 a gallon in the United States. What can keep the globe’s biggest oil-guzzling economy from running dry? Hunched in a war room, top officials are thrashing out the nation’s options beneath illuminated screens depicting diving stock and energy markets. In minutes they must tell the president how to help the nation survive what some call the worst “oil shock …