Sir - In the sorrow and numbness that we feel after the world's worst terrorist attacks, I believe people in Ireland will think about the fact that a number of terrorist groups exist in our midst.
These groups are in control of arsenals of weapons and explosives. Why do they continue to insist on holding on to these? While they do, we can only see them as sharing the disregard for humanity displayed so dramatically by the perpetrators of the attacks in the US. - Yours, etc.,
Tom Sheedy, Seapark, Malahide, Co Dublin.