Jeffrey and Michael Derderian (upper right) claim that 'sound foam' installed in West Warwick club was actually 'cheap packing foam' that helped the deadly fire spread, causing 100 deaths and over 200 injuries, the brothers said in their first public interview on the incident with 48 Hours. 'We wanted the full story to come out, not just some of it, and that for people who want to, come to their own conclusion on what happened that night,' Jeffrey Derderian told 48 Hours ' Jim Axelrod, a three-minute snippet of which was released on Thursday. 'We understand the enormity of what happened. People suffered enormously,' Jeffrey told the Boston Globe in a separate interview prior to the premiere of their upcoming 48 Hours segment. 'We don't want sympathy, but it never leaves us.' Owners of Rhode Island nightclub where 100 people died in inferno caused by band's pyrotechnics break silence after nearly 20 YEARS and say cheap packing foam helped fire spread