US President Barack Obama (R) places commemorative Commander in Chief challenge coins on the memorials of 13 victims of the November 5 shooting in Fort Hood, Texas, as first lady Michelle Obama accompanies him November 10, 2009. [Agencies]

FORT HOOD, Texas: One by one, US President Barack Obama spoke the names and told the stories Tuesday of the 13 people slain in the Fort Hood shooting rampage, honoring their memories as he denounced the "twisted logic" that led to their deaths.

"No faith justifies these murderous and craven acts; no just and loving God looks upon them with favor," Obama told the crowd on a steamy Texas afternoon. "And for what he has done, we know that the killer will be met with justice — in this world and the next."

He did not name Maj. Nidal Hasan, the military psychiatrist accused of the killings.

As for the victims and the soldiers who rushed to help them, Obama said, "We need not look to the past for greatness, because it is before our very eyes." He spoke at a memorial service before a crowd estimated at 15,000 on this enormous Army post.

The president and first lady Michelle Obama began an afternoon of consolation by meeting privately with family members of those killed last week and with those wounded in the attack and their families. Obama used his public remarks to put a human face on those who perished, victims ranging in age from 19 to 62. He also used his platform to speak indirectly to questions about whether the alleged shooter had ties to extremist Islamic ideology.

Below the stage where Obama spoke was a somber tribute to the fallen — 13 pairs of combat boots, each with an inverted rifle topped with a helmet. A picture of each person rested below the boots. After the ceremony, Obama walked solemnly along the row of boots, placing a commander in chief's coin next to each victim's photo in tribute.

Then soldiers and loved ones traced the same path to remember those lost and give a final salute, one woman nearly collapsing with grief.

Even as Obama honored the dead, there was government finger-pointing over what had been known about Hasan and whether he should have been investigated further.

US officials said a Pentagon worker on a terrorism task force had looked into Hasan's background months ago and had concluded he did not merit further investigation. Two officials said the group had been notified of communications between Hasan and a radical Islamic imam overseas and the information had been turned over to a Defense Criminal Investigative Service employee assigned to the task force. The two spoke on condition of anonymity because they were not authorized to discuss the investigation.

The revelation provided fresh evidence the military had been keeping an eye on the Army psychiatrist before the shooting rampage.

One soldier who attended the memorial said the mood at Fort Hood was turning from sadness to anger as soldiers learned more about Hasan's background.

"A lot of folks are angry because they feel this could have been prevented," said Spc. Brian Hill, a 25-year-old soldier from Nashville, Tenn., who was injured in Iraq and walks with a cane. "Somebody should have been paying attention."

Obama remembered the slain not as shooting victims but as husbands and fathers, immigrants and scholars, optimists and veterans of the war in Iraq. He cited one woman who was pregnant when she was gunned down.

The president spoke to loved ones left behind, saying: "Here is what you must also know: Your loved ones endure through the life of our nation."

"Every evening that the sun sets on a tranquil town; every dawn that a flag is unfurled; every moment that an American enjoys life, liberty and the pursuit of happiness — that is their legacy," he said.

He named and described each victim, including Chief Warrant Officer Michael Cahill, a physician's assistant back at work just weeks after having a heart attack; Maj. Libardo Eduardo Caraveo, who spoke little English when he arrived in the United States from Mexico but earned a Ph. D and helped combat units cope with the stress of deployment; Pfc. Aaron Nemelka, an Eagle Scout who signed up "to do one of the most dangerous jobs in the service — defuse bombs."

Later, the president and first lady went to a military hospital to meet with those still recovering from wounds incurred during the attack.