WORLDFOCUS

The U.S. plans to send 20,000 more troops to Afghanistan, where Defense Secretary Robert Gates arrived on Thursday to assess the situation. These soldiers come at the request of General David McKiernan, the commander of U.S. forces in Afghanistan.

Gordon Lubold of The Christian Science Monitor traveled with NATO forces in Afghanistan and discusses efforts to evaluate security in the country, and Jeff Stein of Congressional Quarterly discusses Pakistani militants that have stepped up attacks on NATO supply lines to Afghanistan.

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Former U.S. Army officer John Nagl, a senior fellow at the Center for a New American Security, met with General McKiernan last month and speaks with Martin Savidge about the threat posed in Afghanistan and why these troops are needed.