A U.S. Marine military convoy, seen through military NVG (Night Vision Goggles), passes from Kuwait into southern Iraq, in this file photo from early March 22, 2003. The last U.S. combat troops are leaving Iraq in a convoy to Kuwait, more than seven years after a U.S.-led invasion toppled Iraqi dictator Saddam Hussein, NBC News reported on August 18, 2010. The United States is on schedule to draw down its forces in Iraq to 50,000 by Aug. 31. NBC said the soldiers staying behind would be on a training mission . REUTERS/Oleg Popov/Files (IRAQ - Tags: MILITARY CONFLICT)
A U.S. Marine military convoy, seen through military NVG (Night Vision Goggles), passes from Kuwait into southern Iraq, in this file photo from early March 22, 2003. The last U.S. combat troops are leaving Iraq in a convoy to Kuwait, more than seven years after a U.S.-led invasion toppled Iraqi dictator Saddam Hussein, NBC News reported on August 18, 2010. The United States is on schedule to draw down its forces in Iraq to 50,000 by Aug. 31. NBC said the soldiers staying behind would be on a training mission . REUTERS/Oleg Popov/Files (IRAQ - Tags: MILITARY CONFLICT) © REUTERS | REUTERS
A U.S. soldier shouts
A U.S. soldier shouts "We're Going Home" as he crosses the Kuwait-Iraq border into Kuwait in this August 18, 2010 video frame grab. The U.S. troop strength in Iraq is 56,000, a senior Obama administration official said on Wednesday evening, correcting his earlier statement the troop level was down to the 50,000 level Washington has targeted for the end of the month. REUTERS/NBC News via REUTERS TV (KUWAIT - Tags: MILITARY IMAGES OF THE DAY) NO ACCESS CNN/AOL/YAHOO/WIRELESS. NO SALES. NO ARCHIVES. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. NO ONLINE USE. NOT FOR SALE FOR INTERNET DISPLAY. UNITED STATES OUT. NO COMMERCIAL OR EDITORIAL SALES IN UNITED STATES. TEMPLATE OUT © Reuters/REUTERS | Reuters
A column of U.S. Army Stryker armored vehicles cross the border from Iraq into Kuwait Wednesday, Aug. 18, 2010. The U.S. Army's 4th Battalion, 9th Infantry Regiment, part of the 4th Brigade, 2nd Infantry Division, are the last combat brigade to leave Iraq as part of the drawdown of U.S. forces. (AP Photo/ Maya Alleruzzo)
A column of U.S. Army Stryker armored vehicles cross the border from Iraq into Kuwait Wednesday, Aug. 18, 2010. The U.S. Army's 4th Battalion, 9th Infantry Regiment, part of the 4th Brigade, 2nd Infantry Division, are the last combat brigade to leave Iraq as part of the drawdown of U.S. forces. (AP Photo/ Maya Alleruzzo) © AP | AP
U.S. Marine Corp assaultman Kirk Dalrymple watches as a statue of Iraq's President Saddam Hussein falls in central Baghdad in this April 9, 2003 file photo. The last U.S. combat troops are leaving Iraq in a convoy to Kuwait, more than seven years after a U.S.-led invasion toppled Iraqi dictator Saddam Hussein, NBC News reported on August 18, 2010. The United States is on schedule to draw down its forces in Iraq to 50,000 by Aug. 31. NBC said the soldiers staying behind would be on a training mission . REUTERS/Goran Tomasevic/Files (IRAQ - Tags: CIVIL UNREST CONFLICT)
U.S. Marine Corp assaultman Kirk Dalrymple watches as a statue of Iraq's President Saddam Hussein falls in central Baghdad in this April 9, 2003 file photo. The last U.S. combat troops are leaving Iraq in a convoy to Kuwait, more than seven years after a U.S.-led invasion toppled Iraqi dictator Saddam Hussein, NBC News reported on August 18, 2010. The United States is on schedule to draw down its forces in Iraq to 50,000 by Aug. 31. NBC said the soldiers staying behind would be on a training mission . REUTERS/Goran Tomasevic/Files (IRAQ - Tags: CIVIL UNREST CONFLICT) © Reuters/REUTERS | Reuters
U.S. President George W. Bush delivers a speech to crew aboard the aircraft carrier USS Abraham Lincoln, as the carrier steamed toward San Diego, California declaring combat operation over in Iraq, in this May 1, 2003 file photo. The last U.S. combat troops are leaving Iraq in a convoy to Kuwait, more than seven years after a U.S.-led invasion toppled Iraqi dictator Saddam Hussein, NBC News reported on August 18, 2010. The United States is on schedule to draw down its forces in Iraq to 50,000 by Aug. 31. NBC said the soldiers staying behind would be on a training mission . REUTERS/Larry Downing/Files (UNITED STATES - Tags: POLITICS MILITARY)
U.S. President George W. Bush delivers a speech to crew aboard the aircraft carrier USS Abraham Lincoln, as the carrier steamed toward San Diego, California declaring combat operation over in Iraq, in this May 1, 2003 file photo. The last U.S. combat troops are leaving Iraq in a convoy to Kuwait, more than seven years after a U.S.-led invasion toppled Iraqi dictator Saddam Hussein, NBC News reported on August 18, 2010. The United States is on schedule to draw down its forces in Iraq to 50,000 by Aug. 31. NBC said the soldiers staying behind would be on a training mission . REUTERS/Larry Downing/Files (UNITED STATES - Tags: POLITICS MILITARY) © REUTERS | REUTERS
An Iraqi man inspects a burnt car at the site of a bomb attack in Ramadi, 100 km (60 miles) west of Baghdad, Iraq on 08 August 2010. At least 7 people were killed and 25 others were wounded when a suicide bomber blew his booby-trapped car up in central the al-Ramadi city, a local official said. EPA/STR +++(c) dpa - Bildfunk+++
An Iraqi man inspects a burnt car at the site of a bomb attack in Ramadi, 100 km (60 miles) west of Baghdad, Iraq on 08 August 2010. At least 7 people were killed and 25 others were wounded when a suicide bomber blew his booby-trapped car up in central the al-Ramadi city, a local official said. EPA/STR +++(c) dpa - Bildfunk+++ © dpa/DPA | dpa