Original sentence: After a hot pursuit in which some vehicles and some IRA volunteers escaped, three of the men were tracked to Silverbridge, where the Wessex landed three soldiers and two RUC constables.Another incident occurred on 20 February 1990, when an IRA team composed of at least 20 volunteers attempted to attack a helicopter at Newtownhamilton, but their efforts where thwarted when a van, a car, and several masked men manning a light machine gun were spotted by an RAF Wessex on a reconnaissance mission.Following two attacks with rifles and a rocket-propelled grenade (RPG) in 1974 and 1976, the introduction by the South Armagh Brigade of M-60 machine guns raised its level of firepower.One of the men arrested was Jim Martin, who had recently been part of a scheme to smuggle anti-aircraft missiles from the United States.The men were arrested, but the security patrol was suddenly overwhelmed by a stone-throwing crowd of 40 residents, who forcibly released the suspects.Until the early 1990s, when the Westland Lynx were fitted with heavy machine guns, all British helicopters in Northern Ireland flew unarmed
Edited sentence: After a hot pursuit in which some vehicles and some IRA volunteers vanished, three of the men were tracked to Silverbridge, where the Wessex landed three soldiers and two RUC constables.Another incident occurred on 20 February 1990, when an IRA team composed of at least 20 volunteers attempted to attack a helicopter at Newtownhamilton, but their efforts where thwarted when a van, a car, and several masked men manning a light machine gun were spotted by an RAF Wessex in a reconnaissance mission.Following two attacks with rifles and a rocket-propelled grenade (RPG) in 1974 and 1976, the introduction by the South Armagh Brigade of M-60 machine guns raised the level of the threat.One of the men arrested was Jim Martin, who had recently been part of a scheme to smuggle antiaircraft missiles from the United States.The men were arrested, but the security patrol was suddenly overwhelmed by a stone-throwing crowd of 40 people, who forcibly released the suspects.Until the early 1990s, when the Lynx were fitted with heavy machine guns, all British helicopters in Northern Ireland flew unarmed