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1. President Barack Obama is asking a group of doctors to help push his call for health care reform. Aides said the White House hopes for key action this week as the Senate Finance Committee refuses his health care overhaul¹ bill.

2. A suicide bombing in Pakistan has forced the UN to temporarily close its offices there. Five people were killed in an attack on a UN food agency office. The bombing comes a day after the new leader of Pakistan's Taliban vowed² to carry out new attacks.

3. The attorney for the man charged with trying to extort³ $2 million from David Letterman is making a round of media interviews. He called the talk show host a master of manipulating audiences. He defended Robert Halderman and proclaimed his client's innocence⁴.

4. Three Americans are sharing the 2009 Nobel Prize in Medicine. The trio inspired new lines of cancer research. This year marks the first time two women are among the winners of the medicine prize. Experts say women are often underrepresented as Nobel laureates.