Just Sending More Troops Can't Solve Such Tough Problems As Getting Militants to Lay Down Arms and Allies to Send More Soldiers, and Eliminating Extremist Havens.

President Obama's war strategy began to take shape with his announcement last week that 17,000 additional U.S. troops are headed to Afghanistan. But the thorniest problems still await him: persuading militants to lay down their arms, coaxing help from allies and eliminating extremist havens on the Afghan-Pakistan border.

Many officials believe Obama has one primary shot at remaking Washington's war strategy and overhauling its policy in the region. The administration said last week that it would open that review, which is due in April, to Afghans, Pakistanis and European allies.

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