The public will be able to watch the execution of a former US Army major by firing squad, US Defence Secretary Pete Hegseth has said.
A Defense Department official told the BBC the execution of Nidal Hasan, who shot dead 13 unarmed US soldiers at Fort Hood in 2009, would be livestreamed.
It is believed it would be the first public execution in the US in almost a century. The decision to livestream it is "unprecedented in the modern era" and "on uncertain legal terrain," said John Mills, a lawyer who works with inmates sentenced to death.
"People need to understand that there's serious consequences for these types of things," said Hegseth.
Democratic Senator Chris Murphy told CNN that livestreaming it was "disgusting" and reminiscent of executions carried out by the Islamic State group.
The Pentagon announced earlier this week it would execute Hasan in the first military execution in more than 60 years.
Hasan, a US Army psychiatrist from Virginia, admitted fatally shooting 13 unarmed soldiers in a crowded medical building at Fort Hood.
Alonzo Lunsford, a former US Army sergeant who was shot seven times in the attack, told the BBC's Today programme that he supported the execution by firing squad, as a method "befitting" for what he did.
He does not believe everyone should be able to watch the livestream, concerned about the message it sends younger people, but says it is important that those affected by the shooting are given the opportunity.
"As far as the families of the fallen and the families of the survivors, and the survivors themselves, yes, I think we should be able to look at it uncensored."
Lunsford says he plans to attend the execution and before they pull the trigger he wants Hasan to look him in the eyes. "I want him to know he failed. I'm still here."
The execution is scheduled to take place at Fort Hood in Texas on 3 December, the secretary of the US Army said on Tuesday. It will be the first military execution by firing squad since the end of World War Two.
In court Hasan apologised for "any mistakes". He said during his court martial in 2013 that he believed he was protecting Muslims and the Taliban in Afghanistan.
A military execution requires approval from the US president, according to military law. It also requires appellate review, where a higher court inspects the decision, and a final judgement on its legality to move forward.
The appellate process for Hasan is not over, Mills said, and he is likely to seek review of his conviction and sentence in federal court, which would likely stay the execution.
As such, Mills said that he would be surprised if the execution happened.
"Seeking to make it livestreamed, a firing squad execution, is little more than attention-seeking by the Trump administration and is unlikely to occur, much less deliver any semblance of justice," he added.
Eugene R Fidell, a visiting lecturer at Yale Law School, told the BBC it was a "really unfortunate decision".
"To livestream an execution is just so out of the Middle Ages. In a way, we are so past that as a society, at least I thought so until today," he said.
Fidell said if Hasan pursued legal action, the "proceedings would last years" and "far longer than President Trump's term in the White House".
Certain states require some form of public viewing of executions. Many states require journalists to be present, and the person due to be executed can invite people. Others also allow ordinary citizens to volunteer as witnesses.
But "there hasn't ever been a livestreamed execution," says Deborah Denno, a law professor at Fordham University, who has studied US execution methods.
A livestreamed execution would "force a level of transparency that we have probably never seen before in this country", she says.
"More than half of the country wants the death penalty - even though that's on the decline - an argument could be made that 'if you want the death penalty, then we are going to show you how it's conducted in this country'. And people would have to realise exactly what's happening in a way that many people ignore."
Denno says there are important considerations for a livestream such as whether it would be age-restricted and whether it would contravene the policies of the online platform that hosts the viewing.
The countries with the highest number of executions last year were China, Iran, Saudi Arabia, Yemen and the US, in that order, Amnesty International data shows.
The US government had not executed anyone for 17 years until the final year of Trump's first term as president, when it conducted a flurry of 13 executions. Upon returning to office Trump swiftly overturned predecessor Joe Biden's moratorium on federal executions.
The last military execution in the country took place in 1961, when a US Army private was hanged after being convicted of raping an 11-year-old Austrian girl. The execution was authorised by then-President Dwight D Eisenhower and took place despite the victim's family asking his successor, John F Kennedy, for clemency.
The last military execution by firing squad took place in January 1945, when a young US Army deserter, Eddie Slovik, was shot during the final months of World War Two.
