Derry teen Niall O'Doherty walked 2.7 miles on Saturday, August 13 in aid of Action Duchenne. Niall was diagnosed with Duchenne Muscular Dystrophy when he was a baby and his parents have fundraised tirelessly since then to help find a cure for the life-limiting illness. Niall decided to do his own walk on Saturday to raise funds for research. Video curtesy of Niall's mum Deborah.