Thanks to high oil prices and hefty subsidies, corn-based ethanol is now all the rage in the United States. But it takes so much supply to keep ethanol production going that the price of corn -- and those of other food staples -- is shooting up around the world. To stop this trend, and prevent even more people from going hungry, Washington must conserve more and diversify ethanol's production inputs.

Russia's imperial ambitions did not end with the fall of the Soviet Union. The Kremlin has returned to expansionism, trying to recapture great-power status at the expense of its neighbors, warns one of Ukraine's most prominent politicians. The United States and Europe must counter with a strong response -- one that keeps Russia in check without sparking a new Cold War.

The rift between U.S. military and civilian leaders did not start with George W. Bush, but his administration's meddling and disregard for military expertise have made it worse. The new defense secretary must restore a division of labor that gives soldiers authority over tactics and civilians authority over strategy -- or risk discrediting civilian control of the military even further.