The M62 coach bombing happened on 4th February 1974. An IRA bomb exploded in a coach carrying off-duty Armed Forces personnel and their family members. Twelve people (nine soldiers, three civilians) were killed by the bomb.
The coach had been specially commissioned to carry personnel on leave with their families from and to the bases at Catterick and Darlington during a period of industrial strike action on the trains. The vehicle had departed Manchester some time before, and was making good progress on the M62 mototway. Shortly after midnight, near the Hartshead Moor Motorway Services, there was a large explosion. The blast could be heard several miles away. The coach was reduced to a tangle of twisted metal. It was a horrific scene.
To read more, go to: http://en.wikipedia.org/wiki/M62_coach_bombing and http://news.bbc.co.uk/1/hi/england/bradford/7869077.stm
The memorial to those who were killed can be found at the Hartshead Moor Services (westbound).
This new memorial was unveiled at a special service in February 2009.