Perspective of Dubya's failure in Afghanistan:

...In Kosovo, according to retired Gen. Montgomery Meigs, then commander of the Balkan stabilization force, we were forced to "do less" because the Pentagon claimed it could not send more peacekeeping troops. As a result, says Meigs, "we were unable to run operations inside Kosovo to interdict the internal movement of arms and Albanian-Kosovar fighters to [neighboring] Macedonia." Those armed separatists set off a civil war in Macedonia--stopped only by the timely deployment of more Western troops, including Americans, into that country.

Something very similar happened in Afghanistan. Our biggest failure there occurred in the mop-up stage, following the flight of the Taliban government. Because we had so few troops on the ground, we failed to cut off and destroy the remnants of al Qaeda--including, most likely, Osama bin Laden himself--as they fled into the lawless mountain regions of the Afghan and Pakistani frontier. Our subsequent efforts at nation-building on the cheap have yielded similar results. Our unwillingness to put many troops on the ground has made a mockery of the president's promise for a "Marshall Plan" for Afghanistan. The Western-oriented, U.S.-installed president, Hamid Karzai, controls little more than Kabul, and the rest of the country has already drifted back into warlordism.