Major Hasan doesn't deny that he carried out the November 2009 rampage at Fort Hood, one of the worst mass shootings in U.S. history.

The attack occurred in a building where hundreds of unarmed soldiers, some about to deploy to Afghanistan, were waiting for vaccines and routine checkups.

Hasan walked inside with two handguns, climbed onto a desk and shouted 'Allahu Akbar!' - an Arabic phrase meaning 'God is great!' - then he fired, pausing only to reload.

There are dozens of witnesses who saw it happen but military law prohibits him from entering a guilty plea because authorities are seeking the death penalty.

If Hasan is convicted and sentenced to death there are likely years, if not decades, of appeals ahead. He may never make it to the death chamber at all.

Ahead of his trial, the Army psychiatrist spoke to the American media for the first time last week and said that the U.S. government is at war with Islam.

In the past, Major Nidal Hasan has only spoken via telephone with Al-Jazeera, the transcript of which is evidence in his upcoming trial.
'My complicity was on behalf of a government that openly acknowledges that it would hate for the law of Almighty Allah to be the supreme law of the land,' Hasan said in the lengthy statement released to Fox News on Saturday.

He then says in reference to a war on Islam, 'I participated in it.'
'I would like to begin by repenting to Almighty Allah and apologize to the Mujahideen, the believers, and the innocent. ... I ask for their forgiveness for participating in the illegal and immoral aggression against Muslims, their religion and their lands,' he said in the statement.

He has twice dismissed his lawyers and now plans to represent himself at trial. He's suggested he wants to argue the killings were in 'defense of others' - namely, members of the Taliban fighting Americans in Afghanistan. The trial judge, Col. Tara Osborn, has so far denied that strategy.

Thirteen officers from around the country who hold Hasan's rank or higher will serve on the jury for a trial that will likely last one month and probably longer. They must be unanimous to convict Hasan of murder and sentence him to death. Three-quarters of the panel must vote for an attempted murder conviction.

No active-duty U.S. soldier has been executed since 1961.
The last man executed in the military system was Pvt. John Bennett, hanged in 1961 for raping an 11-year-old girl. Five men are on the military death row at Fort Leavenworth, Kansas, but none are close to being executed.