ton G. Sincoff, Noah H. Kushlefsky, Paul S. Edelman, Robert James Spragg, Steven R. Pounian, Kreindler & Kreindler, New York City, Elliot R. Feldman, J. Scott Tarbutton, John M. Popilock, Sean P. Carter, Stephen A. Cozen O’Connor (Philadelphia), Philadelphia, PA, for Plaintiffs. David P. Gersch, Arnold & Porter, L.L