The United States has about 68,000 U.S. troops in Afghanistan.

Peter Bergen and Leslie H. Gelb
Time

In August, President Obama laid out the rationale for stepping up the fight in Afghanistan: If left unchecked, the Taliban insurgency will mean an even larger safe haven from which al-Qaeda would plot to kill more Americans. So this is not only a war worth fighting. This is fundamental to the defense of our people. Obamas Af-Pak plan is, in essence, a countersanctuary strategy that denies safe havens to the Taliban and al-Qaeda, with the overriding goal of making America and its allies safer. Under Obama, the Pentagon has already sent a surge of 21,000 troops to Afghanistan, and the Administration is even weighing the possibility of deploying as many as 40,000 more.

This is a sound policy. If U.S. forces were not in Afghanistan, the Taliban, with its al-Qaeda allies in tow, would seize control of the country's south and east and might even take it over entirely. A senior Afghan politician told me that the Taliban would be in Kabul within 24 hours without the presence of international forces. This is not because the Taliban is so strong; generous estimates suggest it numbers no more than 20,000 fighters. It is because the Afghan government and the 90,000-man Afghan army are still so weak.

The objections to an increased U.S. military commitment in South Asia rest on a number of flawed assumptions. The first is that Afghans always treat foreign forces as antibodies. In fact, poll after poll since the fall of the Taliban has found that a majority of Afghans have a favorable view of the international forces in their country. A BBC/ABC News poll conducted this year, for instance, showed that 63% of Afghans have a favorable view of the U.S. military. To those who say you cant trust polls taken in Afghanistan, its worth noting that the same type of poll consistently finds neighboring Pakistan to be one of the most anti-American countries in the world.

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