Friction between the North's political leaders is captured on camera in a TV documentary to be broadcast tonight.
Mr Gerry Adams does not have the "bottle" or the "brains" to deliver on IRA decommissioning, according to the North's First Minister, Mr David Trimble, who gave unprecedented access to a film crew through some of the most politically turbulent weeks of the peace process.
"I don't actually think he has got the brains to do it or the bottle to do it," said Mr Trimble on the decommissioning row with the Sinn Fein president. "His political moves are always done slowly and indirectly. He pushes other people to the front. No, I can't see Gerry having the guts to do it."
Trimble - Hero or Traitor will be shown on Channel 4 at 8 p.m. It traces the UUP leader through the political ups and downs of 1998 from the signing of the Belfast Agreement to the Omagh bombing and the awarding of the Nobel Peace Prize last month.
The Deputy First Minister, Mr Seamus Mallon, also features and is critical of his working relationship with Mr Trimble. "It's very difficult to have a rapport with him outside of doing business with him," admits Mr Mallon. He describes him as "tentative" and says he has a "personal requirement to always be right".
"I think he somehow or another doesn't have the capacity to communicate with people, not on an academic basis or a political basis, but on a human basis," adds Mr Mallon. He says if the Northern Assembly collapses, there are two certainties: "One, David Trimble is finished, the other is Gerry Adams who is finished."
Mr Trimble's view of the leader of the Democratic Unionist Party, the Rev Ian Paisley, is that he can be "great fun". "A lot of people go to Paisley's rallies as that, as entertainment," he tells the programme-makers.