On 30 January 1972 British troops opened fire on a civil rights march in Northern Ireland. Thirteen people were killed that day, which became known as Bloody Sunday. Tony Doherty was nine years old at the time. In 2012 he spoke to Mike Lanchin about his father and the events that changed his life forever.

Photo: A British soldier grabs hold of a protester by the hair. (Credit: AFP/Getty Images)