Iraqi guards stand in front of a door inside the Ministry of Defence during a visit from U.S. Secretary of Defense Chuck Hagel, in Baghdad December 9, 2014. U.S. Defense Secretary Chuck Hagel arrived in Baghdad on Tuesday as the United States expands its presence and touts progress against Islamic State militants four months after starting a campaign of air strikes in Iraq. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

Iraqi guards stand in front of the Ministry of Defence during a visit from U.S. Secretary of Defense Chuck Hagel, in Baghdad December 9, 2014. U.S. Defense Secretary Chuck Hagel arrived in Baghdad on Tuesday as the United States expands its presence and touts progress against Islamic State militants four months after starting a campaign of air strikes in Iraq. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel (3rd L) meets with Iraqi Defence Minister Khaled al-Obeidi (2nd R) in Baghdad December 9, 2014. Also pictured is U.S. Ambassador to Iraq Stuart Jones (L). Hagel arrived in Baghdad on Tuesday as the United States expands its presence and touts progress against Islamic State militants four months after starting a campaign of air strikes in Iraq. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY TPX IMAGES OF THE DAY) 

Iraqi Defence Minister Khaled al-Obeidi arrives for a meeting with U.S. Defense Secretary Chuck Hagel in Baghdad December 9, 2014. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel (L) meets with Iraqi Defence Minister Khaled al-Obeidi (R) in Baghdad December 9, 2014. Hagel arrived in Baghdad on Tuesday as the United States expands its presence and touts progress against Islamic State militants four months after starting a campaign of air strikes in Iraq. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

Iraqi Defence Minister Khaled al-Obeidi listens to U.S. Defense Secretary Chuck Hagel during a meeting in Baghdad December 9, 2014. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel (L) meets with Iraqi Minister of Defense Khaled al Obeidi (R) in Baghdad December 9, 2014. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

Iraq's President Fuad Masum looks on during a meeting with U.S. Defense Secretary Chuck Hagel (not pictured) in Baghdad December 9, 2014. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel (L) meets with Iraq President Fuad Masum (R) in Baghdad December 9, 2014. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to the media after a meeting with Iraqi officials in Baghdad December 9, 2014. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to the media after a meeting with Iraqi officials in Baghdad December 9, 2014. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to the media after a meeting with Iraqi officials in Baghdad December 9, 2014. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

U.S. troops listen to U.S. Defense Secretary Chuck Hagel speak during his visit to Baghdad International Airport in Baghdad December 9, 2014. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to troops stationed at Baghdad International Airport in Baghdad December 9, 2014. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to troops stationed at Baghdad International Airport in Baghdad December 9, 2014. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel meets with Iraqi Prime Minister Haider al-Abadi in Baghdad December 9, 2014. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel (3rd L) meets with Iraqi Prime Minister Haider al-Abadi (C) in Baghdad December 9, 2014. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel wears body armor as he steps off a helicopter in Baghdad December 9, 2014. Hagel met with military officials and Iraq's Prime Minister Haider al-Abadi during his visit. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel wears body armor as he steps off a helicopter in Baghdad December 9, 2014. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

Iraqi Prime Minister Haider al-Abadi speaks during a meeting with U.S. Defense Secretary Chuck Hagel in Baghdad December 9, 2014. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

Iraqi Prime Minister Haider al-Abadi speaks during a meeting with U.S. Defense Secretary Chuck Hagel in Baghdad December 9, 2014. REUTERS/Mark Wilson/Pool (IRAQ - Tags: POLITICS MILITARY) 

U.S. troops stand at attention next to an Abrams tank as they wait for the arrival of U.S. Defense Secretary Chuck Hagel at Camp Buehring, Kuwait December 8, 2014. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY) 

A crew member looks out the window of a UH-60 Blackhawk helicopter from Bravo Co 2/147th AVN Renegades flying support for U.S. Defense Secretary Chuck Hagel over Kuwait City December 8, 2014. Hagel flew out to Camp Buehring to visit with troops stationed there. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY) 

A UH-60 Blackhawk helicopter from Bravo Co 2/147th AVN Renegades flies support for U.S. Defense Secretary Chuck Hagel over Kuwait City December 8, 2014. Hagel flew out to Camp Buehring to visit with troops stationed there. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY TPX IMAGES OF THE DAY) 

U.S. Defense Secretary Chuck Hagel (L) shakes hands with U.S. Army Spc. Karen Whitely of Jamaica during a visit with U.S. troops at Camp Buehring, Kuwait December 8, 2014. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY) 

U.S. troops wait for the arrival of U.S. Defense Secretary Chuck Hagel at Camp Buehring, Kuwait December 8, 2014. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY) 

U.S. troops stand at attention for the arrival of U.S. Defense Secretary Chuck Hagel during his visit at Camp Buehring, Kuwait December 8, 2014. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY) 

U.S. troops are pictured as they listen to U.S. Defense Secretary Chuck Hagel speak during his visit at Camp Buehring, Kuwait December 8, 2014. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY) 

U.S. troops listen to U.S. Defense Secretary Chuck Hagel speak during his visit at Camp Buehring, Kuwait December 8, 2014. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel greets U.S. troops during a visit at Camp Buehring, Kuwait December 8, 2014. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to U.S. troops during a visit at Camp Buehring, Kuwait December 8, 2014. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to U.S. troops during a visit at Camp Buehring, Kuwait December 8, 2014. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to U.S. troops during a visit at Camp Buehring, Kuwait December 8, 2014. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to U.S. troops during a visit at Camp Buehring, Kuwait December 8, 2014. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to U.S. troops during a visit at Camp Buehring, Kuwait December 8, 2014. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to members of the media after visiting with U.S. troops at Camp Buehring, Kuwait December 8, 2014. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY HEADSHOT) 

U.S. Defense Secretary Chuck Hagel speaks to members of the media after visiting with U.S. troops at Camp Buehring, Kuwait December 8, 2014. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY HEADSHOT) 

U.S. Defense Secretary Chuck Hagel speaks to members of the media after visiting with U.S. troops at Camp Buehring, Kuwait December 8, 2014. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY) 

Kuwait's Emir Sheikh Sabah al-Ahmed al-Sabah meets with U.S. Defense Secretary Chuck Hagel at the Seif Palace in Kuwait City December 8, 2014. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY ROYALS) 

U.S. Defense Secretary Chuck Hagel (L) meets with Kuwait's Emir Sheikh Sabah al-Ahmed al-Sabah (R) and Crown Prince Sheikh Nawaf al-Ahmad al-Sabah (2nd L) at the Seif Palace in Kuwait City December 8, 2014. REUTERS/Mark Wilson/Pool (KUWAIT - Tags: POLITICS MILITARY ROYALS) 

The Afghan mountains are reflected in the visor of a US Army Airborne CH-47 Chinook window gunner while flying behind U.S. Defense Secretary Chuck Hagel as he travels to visit American troops at Forward Operating Base Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

Members of the U.S. military stand by after listening to U.S. Defense Secretary Chuck Hagel speak during a visit to FOB Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

U.S. Army Brigadier General Christopher F. Bentley shows the way to U.S. Defense Secretary Chuck Hagel during his visit to Forward Operating Base Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

Members of the U.S. military head to an area to meet with U.S. Defense Secretary Chuck Hagel during his visit to Forward Operating Base Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

Members of the U.S. military head to an area to meet with U.S. Defense Secretary Chuck Hagel during his visit to Forward Operating Base Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel (3rd L) listens to Afghan National Army Maj. Gen. Mohammed Zaman Waziri (behind desk) as they look at a map at Forward Operating Base Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

The Afghan mountains are seen as a US Army Airborne CH-47 Chinook window gunner looks out while flying behind U.S. Defense Secretary Chuck Hagel as he travels to visit American troops at Forward Operating Base Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to members of the media after visiting with American troops during a visit to FOB Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to members of the media after visiting with American troops during a visit to FOB Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel presents commemorative coins to American troops during a visit to Forward Operating Base Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to American troops during a visit to Forward Operating Base Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY TPX IMAGES OF THE DAY) 

U.S. Defense Secretary Chuck Hagel speaks to American troops during a visit to Forward Operating Base Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to American troops during a visit to Forward Operating Base Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to American troops during a visit to Forward Operating Base Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to American troops during a visit to Forward Operating Base Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel (2nd L) shakes hands with Ltc Adam Wloczewski (L) during a visit with Polish troops during a visit to Forward Operating Base Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel presents commemorative coins to American troops during a visit to Forward Operating Base Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to American troops during a visit to Forward Operating Base Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel speaks to American troops during a visit to Forward Operating Base Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY) 

U.S. Defense Secretary Chuck Hagel is handed a commemorative coin to give to American troops during a visit to Forward Operating Base Gamberi December 7, 2014. Hagel on Sunday met with troops in Afghanistan on what is likely his last visit there before stepping down from his post. Hagel's visit comes one day after he announced that the U.S. will keep up to 1,000 more soldiers in Afghanistan into next year than previously planned, saying the additional forces were needed because delays in signing security pacts had impacted plans to raise troops from other countries. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS MILITARY)