How Much Longer for US Troops in Iraq?

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The Bush Administration promises no "secret deal" to keep US troops in Iraq, but Senators of both parties say confidential agreements could tie the next president's hands. Is the US trying to establish permanent bases? We'll hear what's being said in Iraq, elsewhere in the Middle East, on Capitol Hill and on the campaign trail. Also, Senate Republicans vote against Democratic energy bill, and after a successful landing on Mars, NASA finds soil sampling is more difficult than expected.

Ambassador David M. Satterfield speaks during a press conference in the 'Green Zone' of Baghdad, Iraq. The Senior Advisor to the Secretary of State and Special Coordinator for Iraq said that a security agreement between the US and Iraqi governments should be complete by the end of July. Photo: Mohammed Jalil-Pool/Getty Images