The violent attack on a gas facility in Algeria throwing such fears into stark relief.
Police said the 32-year-old had been the victim of a "sustained and prolonged" violent attack.
The BBC's Sarah Rainsford said a magistrate had ordered his arrest in connection with a violent attack.
It is the third violent attack in two weeks believed to be motivated by anti-gay bias, police said.
Four Metropolitan Police officers have gone on trial accused of a sustained and violent attack on a terror suspect.
Police said he sustained a number of serious injuries indicating that he has been the victim of a serious and violent attack.
Another senior leader, Will Porter, said nothing satisfactorily explains the violent attack.
Fowler, 66, was arrested in 1995 for a violent attack on a woman in Oregon, and died in a prison there six years ago.
He said people who have lost a family member in a violent attack want advice from them because "we have learned from experience not from textbooks".
Reporters do not actively go out to many random areas and see if anyone has been killed in a violent attack, but wait for reports to come in.
In the past year, you were more likely to suffer a violent attack or have your car broken into in Norwich or Peterborough than in London or Birmingham.
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But the horrific and the extraordinary often sit side by side with the mundane, and nothing illustrates this better than the drivers' responses to the threat of violent attack.
The moment of silence also was recognized on the floor of the New York Stock Exchange and in Boston, where lawmakers were shaken by the violent attack on a legislator thousands of miles away.
After sentencing at Bristol Crown Court, Det Ch Insp Simon Crisp said it was a "violent and unprovoked" attack.
What made the In Amenas attack so violent and lethal may turn out to be due to the very specific nature of how events unfolded on the ground.
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Mr Khan is firmly against violent extremism, and the attack on Malala sickened him as much as anyone.
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Judge Adrian Smith said Khosravi was a well-educated man from a "decent, supportive family" who turned "violent and frighteningly menacing" during the attack.
When prosecutor Richard Hearnden went through Mrs Jankowitz's account of the attack Mr Imiela denied he was violent.
The court earlier heard the brothers, who were placed in foster care a few months before the attack, had a chaotic upbringing with their violent father, mother and five brothers.
In the article, New York-based reporter Jana Winter cited anonymous law-enforcement sources who said shooting suspect James Holmes sent a notebook containing violent drawings to a University of Colorado, Denver psychiatrist before the attack.
Hakura said the Turkish military wanted to conduct a surprise attack against the PKK prior to the springtime, when violent attacks tend to escalate, and when the snow in the mountainous border region leaves the fighters' footprints.
The guidelines do not cover people who deliberately use dogs to attack because those incidents should lead to prosecutions for assault or more serious violent crimes.
The Japanese attack at Pearl Harbor, on December 7, 1941, was a violent shock, but only in the nature and extent of the destruction: by then, most Americans had come to believe that the country would be dragged into the global war with Fascism one way or another, though their eyes were fixed on Europe, not the Pacific.
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