New York, 10 September 2005 (RFE/RL) -- It's four years since 9/11 but for Herb Ouida, the years have done little to dull the pain. His voice still trembles when he recalls the day he lost his son, Todd, in the World Trade Center. Both had been at work in the North Tower -- Herb on the 77th floor and Todd on the 105th, where he was a foreign-currency-options trader for Cantor Fitzgerald. When the first passenger jet slammed into the tower, Herb somehow made it out but Todd was trapped. Herb hasn't seen his son since the morning they set out for work together. But he refuses to live in the past. When Todd was a child, he suffered severely from a panic disorder that forced him to leave school for three years of treatment in a therapy clinic. Today, Herb, who is of Arabic origin, has given up his old job as executive vice president of the World Trade Centers Association to set up the Todd Ouida Children's Foundation, created both to celebrate his son's tragically truncated life and to provide financial support for psychological services for other children who suffer from panic disorder but are from poorer families. In this second part of our three-part series on 9/11, RFE/RL speaks to Herb Ouida, and begins by asking him how he and his wife have learned to cope with the memory of that day.