Memorial at Fort Hood

Soldiers comfort each other before the start of a memorial service for the Fort Hood shooting victims, to be attended by President Barack Obama, Tuesday, Nov. 10, 2009, at Fort Hood, Texas.

A Soldiers Cross, honoring those who lost their lives in last week's shooting, is seen near the podium where President Barack Obama will speak at the memorial service, Tuesday, Nov. 10, 2009, at Fort Hood, Texas.

A Soldiers Cross, honoring those who lost their lives in last week's shooting, is seen near the podium, and a flag at half-staff, where President Barack Obama will speak at the memorial service, in Fort Hood, Texas, Tuesday, Nov. 10, 2009.

Attendees grieve as they arrive for the start of a memorial service at Fort Hood, Texas, Tuesday, Nov. 10, 2009, where President Barack Obama spoke.

People in the crowd are emotional as they take their seats at a memorial service at Fort Hood, Texas, Tuesday, Nov. 10, 2009, where President Barack Obama spoke. On the steamy Texas day, the crowd kept growing until the minutes before the service began.

An Army soldier identified only as Nguyen is helped down steps before a memorial service at Fort Hood, Texas, Tuesday, Nov. 10, 2009, where President Barack Obama spoke.

Soldiers are shown during a memorial service for victims of the Fort Hood shooting, Tuesday, Nov. 10, 2009, at Fort Hood, Texas. The shooting left 12 soldiers and 1 civilian dead, injured 29 others and left a nation stunned and searching for answers.

President Barack Obama and first lady Michelle Obama arrive at a memorial services at Fort Hood, Texas, Tuesday, Nov. 10, 2009. Stepping for the first time into the role of national consoler, President Barack Obama honored the 13 people slain in the Nov. 5 shooting rampage.

From left to right, Lt. Gen. Robert W. Cone, first lady Michelle Obama and President Barack Obama, lower their heads during the Invocation at a memorial service at Fort Hood, Texas, Tuesday, Nov. 10, 2009.

Fort Hood Commanding General Lieutenant General Robert W. Cone speaks during a memorial service at Fort Hood, Texas, on Tuesday, Nov. 10, 2009, honoring those who lost their lives during a mass shooting at the Army post the week before.

General George W. Casey, Jr, chief of staff of the Army, speaks during a memorial service at Fort Hood, Texas, on Tuesday, Nov. 10, 2009, honoring those who lost their lives during a mass shooting at the Army post the week before.

President Obama speaks during a memorial service at Fort Hood, Texas, Tuesday, Nov. 10, 2009. "Neither this country -- nor the values that we were founded upon -- could exist without men and women like these 13 Americans," Mr. Obama said during his speech, mentioning personal stories about each of the 12 soldiers and one civillian who died in the Nov. 5 mass shooting at the Army post.

President Barack Obama speaks at a memorial services at Fort Hood, Texas, Tuesday, Nov. 10, 2009. In the foreground is a photo of Sgt. Amy S. Krueger.

An unidentified army soldier looks emotional during a memorial service at Fort Hood, Texas, Tuesday, Nov. 10, 2009, where President Barack Obama spoke.

Soldiers hug on Tuesday, Nov. 10, 2009, at a memorial service at Fort Hood, Texas, for the victims of the Fort Hood shootings.

Family of the victims of the Fort Hood shooting file past a memorial for the fallen after a speech by President Obama at Fort Hood, Texas, Tuesday, Nov. 10. 2009.

Family members of Pvt. 1st Class Kham Xiong, who died in the Fort Hood shootings, grieve by a photo of him, at a memorial service at Fort Hood, Texas, for the victims of the Fort Hood shootings on Tuesday, Nov. 10, 2009.

A family member hugs the picture and touches the boots of a fallen soldier during a memorial in honor of the thirteen victims of the shooting at Fort Hood held at U.S. Army's III Corps headquarters at Fort Hood, Texas, on Tuesday, Nov. 10, 2009.

A family member touches the picture of a fallen soldier during a memorial in honor of the thirteen victims of the shooting at Fort Hood held at U.S. Army's III Corps headquarters at Fort Hood, Texas, on Tuesday, Nov. 10, 2009.

President Barack Obama, accompanied by first lady Michelle Obama, places a Presidential challenge coin at the memorial for Capt. Russell G. Seager, Tuesday, Nov. 10, 2009, during a memorial service at Fort Hood in Texas.