Our series America's Briefing Book continues with former Supreme Commander of NATO General (Ret.) Wesley Clark helping us find out what President-elect Barack Obama needs to know about NATO. Clark names some external security challenges for Barack Obama, including finding the right way to get out of Iraq. He says this accord between Iraq and the US is positive but not the final answer. Clark also says we have to have a strategy for Afghanistan that works and use non-military units of power more.

We're continuing our series "America's Briefing Book" with a focus on what President-elect Obama needs to know about the military. As he transitions to Commander-in-Chief, Barack Obama will have to negotiate troop withdrawal from Iraq, wrestle with the best method of defeating Al Qadea cells in Afghanistan and ensure that the U.S. provides for the welfare of servicemen and women at home and abroad. Joining us is General Wesley Clark, former Supreme Allied Commander Europe for NATO and a presidential candidate in the 2004 democratic primaries.

In his new memoir, A Time to Lead, General Wesley Clark reflects on a distinguished military career, reveals what motivated his 2004 presidential campaign, and ponders the future of American politics.

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