Jim Cusack: Gun and bomb attacks replaced by oil truck traffic
Shortly after his elevation to the position of "officer commanding" of the IRA in South Armagh, Thomas 'Slab' Murphy began openly mixing terrorism with business.
Gardaí at the time, now retired, noticed that when they had wind of IRA operations taking place just across the Border there seemed to be fewer gun and bomb attacks on the British Army, and more cross-Border traffic by oil tankers.
"They were clearing the roads, as they called it, and in those days that would normally mean there was going to be an attack," one recalled. "That was the usual signature in preparing operations.