Baitullah Mehsud, the leader of the Taliban movement in Pakistan, was reportedly killed this week by a CIA drone strike. ITN correspondent Alex Thomson reports.

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Secretary of State Clinton spent the second day of her African tour expressing support for the fragile transitional government in Somalia. Margaret Warner reports on the visit, and the risks posed by the Somali government's struggles to combat extremist groups…

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In other news, Defense Secretary Robert Gates announced that the Army would add 22,000 more soldiers to its ranks, and in Mumbai, India, the only surviving gunman in last November's shooting attacks changed his plea to guilty.

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In other news, large gains in the banking and tech sectors led markets higher, and a passenger plane crashed in Iran, killing all 168 people on board.

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Several hundred refugees began returning home to Pakistan's Swat Valley on Monday, part of a government repatriation program to resettle an estimated 2 million people who were displaced from their homes last spring because of fighting.

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In other news, nearly 60 Iraqis were killed in a series of bombings, and some two million Pakistani refugees will be allowed to return home after fleeing from a Taliban offensive.

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In other news, Chinese troops moved into the Xinjiang Province to stop the ethnic rioting that has left 156 dead since Sunday, and North Korean leader Kim Jong Il has appeared in public for the first time since last April.

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In other news, stocks dipped to their lowest levels in more than two months on doubts about the strength of the economic recovery, and the president of Costa Rica agreed to mediate the political crisis in Honduras.

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In other news, Alaska Gov. Sarah Palin announced her resignation effective later this month, and officials in Pakistan reported that 17 people were killed in a U.S. drone aircraft attack targeting members of the Taliban.

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U.S. Marines marked the start of a new offensive in Afghanistan Thursday, as part of the Obama administration's efforts to stabilize the Afghan-Pakistan border region. A Washington Post reporter embedded in the Helmand province provides an update.

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