OSAMA BIN LADEN was killed within 90 seconds of the US Navy Seals landing in his compound and not after a protracted gun battle, according to the first account by the men who carried out the raid.

The operation was so clinical that only 12 bullets were fired.

The Seals have spoken out because they were angered at the version given by politicians, which they see as portraying them as cold-blooded murderers on a “kill mission”.

They were also shocked that President Barack Obama announced bin Laden’s death on television the same evening, rendering useless much of the intelligence they had seized.

Chuck Pfarrer, a former commander of Seal Team 6, which conducted the operation, has interviewed many of those who took part for a book, Seal Target Geronimo, to be published in the US this week.

The Seals’ own accounts differ from the White House version, which gave the impression that bin Laden was killed at the end of the operation rather than in its opening seconds.

Pfarrer insists bin Laden would have been captured had he surrendered.

The first hint of the mission came in January last year when the team’s commanding officer was called to a meeting at the headquarters of joint special operations command.

The meeting was held in a soundproof bunker three stories below ground with his boss, Admiral William McRaven, and a CIA officer.

They told him a walled compound in Pakistan had been under surveillance for a couple of weeks. They were certain a high-value individual was inside and needed a plan to present to the president.

It had to be someone important. “So is this Bert or Ernie?” he asked. The Seals’ nicknames for bin Laden and his deputy Ayman al-Zawahiri are a reference to two Muppets in Sesame Street, one tall and thin and the other short and fat.

“We have a voice print,” said the CIA officer, “and we’re 60 per cent or 70 per cent certain it’s our guy.” McRaven added that a reconnaissance satellite had measured the target’s shadow. “Over 6ft tall.”

When McRaven added they would use Ghost Hawk helicopters, the team leader had no doubt. “These are the most classified, sophisticated stealth helicopters ever developed,” said Pfarrer. “They are kept in locked hangars and fly so quiet we call it ‘whisper mode’.”

Over the next couple of months a plan was hatched. A mock-up of the compound was built at Tall Pines, an army facility in a national forest somewhere in the eastern US.

Four reconnaissance satellites were placed in orbit over the compound, sending back video and communications intercepts. A tall figure seen walking up and down was named “the Pacer”.

Mr Obama gave the go-ahead and Seal Team 6, known as the Jedi, was deployed to Afghanistan. The White House cancelled plans to provide air cover using jet fighters, fearing this might endanger relations with Pakistan.

Sending in the Ghost Hawks without air cover was considered too risky so the Seals had to use older Stealth Hawks. A Prowler electronic warfare aircraft from the carrier USS Carl Vinson was used to jam Pakistan’s radar and create decoy targets.

Operation Neptune’s Spear was initially planned for April 30 but bad weather delayed it until May 1, a moonless night.

The commandos flew on two Stealth Hawks, codenamed Razor 1 and 2, followed by two Chinooks five minutes behind, known as “Command Bird” and the “gun platform”.

On board, each Seal was clad in body armour and night vision goggles and equipped with laser targets, radios and sawn-off M4 rifles.

They were expecting up to 30 people in the main house, including Bin Laden and three of his wives, two sons, Khalid and Hamza, his courier, Abu Ahmed al- Kuwaiti, four bodyguards and a number of children.

At 56 minutes past midnight the compound came into sight and the code “Palm Beach” signaled three minutes to landing.

Razor 1 hovered above the main house, a three-story building where bin Laden lived on the top floor. Twelve Seals abseiled the two metres down onto the roof and then jumped to a third-floor patio, where they kicked in the windows and entered.

The first person the Seals encountered was a terrified woman, bin Laden’s third wife, Khaira, who ran into the hall. Blinded by a searing white strobe light they shone at her, she stumbled back. A Seal grabbed her by the arm and threw her to the floor.

Bin Laden’s bedroom was along a short hall. The door opened; he popped out and then slammed the door shut. “Geronimo, Geronimo, Geronimo,” radioed one Seal, meaning “eyes on target”.

At the same time lights came on from the floor below and bin Laden’s son Khalid came running up the stairs towards the Seals. He was shot dead.

Two Seals kicked in bin Laden’s door. The room, they later recalled, “smelt like old clothing, like a guest bedroom in a grandmother’s house”. Inside was the al-Qa’ida leader and his youngest wife, Amal, who was screaming as he pushed her in front of him.

“No, no, don’t do this!” she shouted as her husband reached across the king-size bed for his AK-47 assault rifle. The Seals reacted instantly, firing in the same second. One round thudded into the mattress.

The other, aimed at bin Laden’s head, grazed Amal in the calf. As his hand reached for the gun, they each fired again: one shot hit his breastbone, the other his skull, killing him instantly and blowing out the back of his head.

Meanwhile Razor 2 was heading for the guesthouse, a low, shoebox-like building, where bin Laden’s courier, Kuwaiti, and his brother lived.

As the helicopter neared, a door opened and two figures appeared, one waving an AK-47. This was Kuwaiti. In the moonless night he could see nothing and lifted his rifle, spraying bullets wildly.

He did not see the Stealth Hawk. On board someone shouted, “Bust him!”, and a sniper fired two shots. Kuwaiti was killed, as was the person behind him, who turned out to be his wife. Also on board were a CIA agent, a Pakistani- American who would act as interpreter, and a sniffer dog called Karo, wearing dog body armour and goggles.

Within two minutes the Seals from Razor 2 had cleared the guesthouse and removed the women and children.

They then ran to the main house and entered from the ground floor, checking the rooms. One of bin Laden’s bodyguards was waiting with his AK-47. The Seals shot him twice and he toppled over.

Five minutes into the operation the command Chinook landed outside the compound, disgorging the commanding officer and more men. They blasted through the compound wall and rushed in.

The commander made his way to the third floor, where bin Laden’s body lay on the floor face up. Photographs were taken, and the commander called on his satellite phone to headquarters with the words: “Geronimo Echo KIA” – bin Laden enemy killed in action.

“This was the first time the White House knew he was dead and it was probably 20 minutes into the raid,” said Pfarrer.

A sample of bin Laden’s DNA was taken and the body was bagged. They kept his rifle. It is now mounted on the wall of their team room at their headquarters in Virginia Beach, Virginia, alongside photographs of a dozen colleagues killed in action in the past 20 years.

At this point things started to go wrong. Razor 1 took off but the top secret “green unit” that controls the electronics failed. The aircraft went into a spin and crashed tail-first into the compound.

The Seals were alarmed, thinking it had been shot down, and several rushed to the wreckage. The crew climbed out, shaken but unharmed.

The commanding officer ordered them to destroy Razor 2, to remove the green unit, and to smash the avionics. They then laid explosive charges.

They loaded bin Laden’s body onto the Chinook along with the cache of intelligence in plastic bin bags and headed toward the USS Carl Vinson. As they flew off they blew up Razor 2. The whole operation had taken 38 minutes.

The following morning White House officials announced that the helicopter had crashed as it arrived, forcing the Seals to abandon plans to enter from the roof.

A photograph of the situation room showed a shocked Hillary Clinton, the secretary of state, with her hand to her mouth. Why did they get it so wrong?

What they were watching was live video but it was shot from 20,000ft by a drone circling overhead and relayed in real time to the White House and Leon Panetta, the CIA director, in Langley. The Seals were not wearing helmet cameras, and those watching in Washington had no idea what was happening inside the buildings.

“They don’t understand our terminology, so when someone said the ‘insertion helicopter’ has crashed, they assumed it meant on entry,” said Pfarrer.

What infuriated the Seals, according to Pfarrer, was the description of the raid as a kill mission.

“I’ve been a Seal for 30 years and I never heard the words ‘kill mission’,” he said. “It’s a Beltway (Washington insider’s) fantasy word. If it was a kill mission you don’t need Seal Team 6; you need a box of hand grenades.”

Editing:  Jim W. Dean