Tissue from the brain of a man who shot dead 18 people is being analysed for signs of injury related to his army service.
Robert Card, 40, carried out his rampage on 25 October, opening fire in a bowling alley and bar in Lewiston in Maine.
Card, who was found dead after a three-day manhunt, was in the US Army Reserve and there are concerns about his repeated exposure to blasts when he trained cadets about guns, grenades and anti-tank weapons.
The state medical examiner wants to see if a brain injury might have contributed to his unusual behaviour leading up to the shooting.
Friends and family said he showed paranoid behaviour in the summer while training recruits at West Point, New York, and was admitted to a psychiatric hospital for two weeks.
They said, among other things, he was hearing voices and believed others were accusing him of being a paedophile.
Card’s colleagues were so concerned that his access to weapons was restricted when he left hospital and at least one reservist raised concerns about a mass shooting.
There were fears he could commit another mass killing while police were searching for him after the shooting.
It was later ruled that he killed himself.
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A spokesperson for the medical examiner said a lab in Massachusetts was looking at the brain tissue in order to be thorough, and “due to the combined history of military experience and actions”.
The Pentagon said the Army was involved in studies on “blast overpressure” and the brain and is reducing soldiers’ exposure until the results are known.
“The Army is committed to understanding, mitigating, accurately diagnosing and promptly treating blast overpressure and its effects in all forms,” said spokesman Lt Col Rob Lodewick.
“While prolonged blast exposures can be potentially hazardous, even if encountered on the training range and not the battlefield, there is still a lot to learn.”
Apple has apologised for its new iPad Pro advert where it crushed cameras, books and musical instruments, saying it “missed the mark”.
The advert – shared online by Apple chief executive Tim Cook – also featured creative tools such as a record player and a metronome being crushed in an industrial press.
It was intended to show off the wide range of tools that the thinnest ever iPad can be used for.
But the advert came under fire, with actor Hugh Grant saying it showed the “destruction of the human experience. Courtesy of Silicon Valley”.
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In a statement, Apple’s vice president of marketing communications Tor Myhren said: “Creativity is in our DNA at Apple, and it’s incredibly important to us to design products that empower creatives all over the world.
“Our goal is to always celebrate the myriad of ways users express themselves and bring their ideas to life through iPad. We missed the mark with this video, and we’re sorry.”
Songwriter Crispin Hunt called the advert “surprisingly tone-deaf” and said Apple “previously enabled and championed creativity”.
Adam Singer, from advertising technology company AdQuick, called it the “(unintentional) perfect metaphor for today’s creative dark age”.
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“Compress organic instruments, joyful/imperfect machines, tangible art, our entire physical reality into a soulless, postmodern, read-only device a multi-trillion dollar corporation controls what you do with,” he wrote on X.
Sales for iPads dropped 17% for January to March compared to the same period a year ago. The tablets currently account for just 6% of the company’s sales.
Craig Gordon, from the Utah Avalanche Center, said around 2.5ft (76cm) of heavy, wet snow had fallen in the area in the past three days during the snow storms, which he said had also brought very strong winds.
“With spring, avalanche conditions can change in an instant,” Mr Gordon said.
He also described the sight of the avalanche, near Lone Peak, as “very serious” and “steep” terrain.
Lone Peak, is one of the highest peaks in the Wasatch Range, towering over Utah’s capital city.
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Its steep, rugged terrain makes it a popular destination for advanced back country skiers and experienced climbers.
The sheriff’s office said the families of the two skiers had been notified of their deaths.
The deaths bring this winter’s tally of avalanche deaths in the US to at least 15 – which is less than the average of about 30 people who are killed by avalanches each year.
Justin and Hailey Bieber have announced they are expecting their first child.
Hailey, the 27-year-old model, posted a video and a series of photos on Instagram showing off her baby bump.
Justin, 30, is also in the social media footage and has shared his wife’s post. It racked up over 1.8 million likes in less than an hour.
The announcement did not include a caption, with Hailey simply tagging her husband in the post.
The couple tied the knot in a secret ceremony in New York in 2018. The Instagram footage shows Hailey in a white lace dress during an apparent vow renewal held in a field.
Kylie Jenner was among the celebrities congratulating the couple in the comments of Hailey’s social media post.
US reality star and entrepreneur Kim Kardashian, model Gigi Hadid and TV personality Chrissy Teigen also commented with their warm wishes.
Hailey is the daughter of actor Stephen Baldwin and niece of actors Alec, William and Daniel Baldwin, while Justin was discovered as a singer online aged 13 and went on to become a pop sensation with his hits including Baby, Love Me and Yummy.
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The Canadian superstar was forced to cancel the remaining dates of his Justice world tour last year amid his ongoing recovery from Ramsay Hunt syndrome, a condition that can cause facial paralysis.
He unexpectedly stepped on stage at Coachella last month to perform the 2020 hit single Essence, alongside Wizkid, during a set by Nigerian star Tems.