CASP3 and B-cell non-Hodgkin lymphoma: Transplantation of Pot1b∆/∆; p53−/− B cells expressing a dominant negative form of Caspase 3 promotes lymphomagenesis in SCID mice, further supporting the hypothesis that dysfunctional telomeres induced by Pot1b loss activates p53‐independent apoptosis to suppress the formation of B‐cell lymphomas.