The parents of an Irish American US Navy Seal who was killed in action in Afghanistan a decade ago, and whose story inspired a Hollywood movie, have expressed delight at an Irish group’s decision to honour his memory.

Watching footage of terrorist attacks and their aftermath on television can alter the structure of the brain, experts said today.

President McAleese leaves Dublin today for a five-day visit to the US, where she will lay a wreath at Ground Zero in New York.