A first response told the hair -raising moment that she understood the true horror of the bomb attacks of July 7, two decades after the devastating attacks.
Superintendent Anna Bearman, when a 23-year-old police officer at the Response team of the Metropolitan Police, was then serving suicide binnia three underground trains in London and a bus.
Initially, she and her three colleagues were informed of an incident at King's Cross, considered a fire.
However, Mrs Bearman vividly reminds himself of the pinch-in-the-machine feeling, because she understood that the situation was a lot of sinister than had reported it first.
She said: “On July 7 it was a fun summer morning and everyone was delighted because we had just won the bid for the Olympic Games in London.

Officer Bearman in 2002, before the bomb attacks of July 7 (family hand –out)
“We were serving and heard that there was confusion at King's Cross and that there might have been a fire, so we went to the train station.
“As we were at Euston station, we were asked to distract to Russell Square, and we were told that there were injured people who fled both stations.
“I remember that it was the moment that I thought it wasn't a fire, and it was a little more sinister. It was a pinch in the Montale moment.”
Mrs Bearman described how the four agents are silent in the vehicle, because it realized that it was a major incident.
Upon arrival they saw dozens of people from Russell Square station, with a lot of suffering from injuries.
She said: “There were injuries and a feeling of hysteria and panic, but we could not stop and talk to them because we had to go into the tunnel to help those who could not walk.
“We walked about a mile on the tracks, and then we wore one person who had lost a lower limb because there were no stretchers, and we took them a mile back to Russell Square.”

7/7: The London Bombing. Victims are guided from the scene (Getty)
After a second injured person and returning to the train for the third time, they were told that there were no more people who had to be saved, and they turned to find oxygen tanks for the injured triage area.
Mrs Bearman remembers: “After that, the main task that directed and reassure members of the public, and tried to keep them calm at the moment.
“Later I saw that my pants and my legs were absolutely stained with blood, and that was when the shock of the whole day started.
“The 20th anniversary is really important to remember the people who have been affected, but also their families and loved ones.”
Dr. Peter Holden, a general practitioner from Derbyshire, was 50 when the bombing took place.
He was not supposed to be in London on July 7, but in his role as deputy chairman of the BMA GP committee he was called to a meeting with a minister of Minister on BMA House on Tavistock Square.
That was where a fourth device exploded in a bus that was diverted after the attacks on Aldgate, Edgware Road and Russell Square tube stations.
Dr. Holden, who had received a major incident course and helped on the day of dozens of people, remembers: “I realized that it was really serious when the Royal London -helicopter floated overhead for a considerable time.
“And then I just turned to my colleague Mary Church, who is the chairman of the committee, we heard a bang and then everything just went salmon pink.
“It was something that shook the ground. We were three floors up where the bomb went on the bus, and we looked out the window, and there was a white plume of smoke and the tree shed had disappeared.
“When I came down, people were brought in on folding table tops that were used for conferences such as improvised stretchers.”
If someone with training for emergency care, Dr. recalls Handed himself that he led 15 doctors and set up an improvised triage area.
He remains proud of the efforts that his team made in the crisis, even though he has to make difficult decisions about who is currently priorities.
Dr. Holden said: “There was a complete series of people – there were Christians, Jews, Muslims, Hindus, those of no particular faith.
“I think there were eight different nationalities from all over the world – Medicine is really an international practice.
“But we had to leave two people we describe as P1 expectations, those who are deeply unconscious and for whom medical care is extremely unlikely to help, and you just have to leave them with another person so that they are not alone.
“It was the most difficult decision of my life, and it still chases me, because there is a humanity in providing care.
“It was a terrible day, but I was grateful that I was there and could help people.”