A prominent US magazine has claimed Sinn Fein leader Gerry Adams was central to the planning of the infamous 1973 IRA London bomb attack that left one person dead and maimed more than 200 others.
The New Yorker magazine, which is read by more than 4.5 million Americans, also repeated claims by deceased IRA bomber Dolours Price that Mr Adams ordered the murder of mother-of-ten Jean McConville.
The author, Patrick Radden Keefe, also recounts how he was present when Mr Adams made his infamous remarks about Michael Collins sending armed men into the offices of the Irish Independent.
"Just as Adams was reminiscing about his first visit to the White House, in 1994, the brute in him came out," Mr Radden Keefe wrote.
The New Yorker article, headlined 'Where the Bodies are Buried' claims Mr Adams became an IRA volunteer at age 16.
The year-long investigation gives explicit details of how Mr Adams, along with Ms Price and her sister Marian, plotted a bombing campaign in Britain during the 1970s.
In 1973, Mr Adams told a group of IRA volunteers that plans to launch the first British bombing campaign in 30 years "could be a hanging job", according to the magazine.
"If anyone doesn't want to go, they should up and leave now," Mr Adams added, resulting in several people walking out of the meeting.
The bombing attack orchestrated by Dolours Price, which planned to detonate devices in four locations in London, was infiltrated by the British security services.
Ms Price and her sister Marian were subsequently arrested and prosecuted for plotting the attack.
Mr Adams continuously denies any involvement in the murder of Ms McConville after she was kidnapped from her home in front of her children.
He was arrested in connection with the murder last year, but later released without charge by the PSNI.
The magazine asked Provisional IRA founding member Billy McKee who was responsible for Ms McConville's murder.
"What would happen if I knew and I told you, and they all got arrested? I would be the axe man. I wouldn't like to put my enemies in jail, never mind some of my friends," Mr McKee responded.
Sinn Fein did not respond to requests for comment.