Contributed Photo\Mel Nudelman/ NYSE NYSE Euronext welcomes the officials and guests of the Tri-State Trek benefitting ALS TDI. Sergeant Roger Petrone (center, in uniform) rang The Opening Bell at the stock exchange accompanied by Dr. Steve Perrin, CEO & Chief Scientific Officer, ALS Therapy Development Institute., joined by Duncan Niederauer, CEO, NYSE Euronext. Photo: Contributed Photo, Contributed Photo\Mel Nudelman/ NYSE / Greenwich Time Contributed