Private Sean Rooney died from gunshots wounds while travelling in an armoured convoy.
The Taoiseach says the State is determined to get the truth about what happened to a young Irish soldier killed while on duty in Lebanon.
24-year-old Seán Rooney died from gunshot wounds sustained while traveling in an armoured convoy to Beirut.
He was due to get married next year.
Another soldier, Private Shane Kearney, is still in a serious condition following the same attack.
Retired Sergeant Major from Mullingar, Noel O' Callaghan, says the work of the Defence Forces can't be taken for granted:
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