premise: He died in a ferryboat accident on Lake Victoria just a few days after Bin Ladin arrived in Jalalabad , leaving Bin Ladin with a need to replace him not only in the Shura but also as supervisor of the cells and prospective operations in East Africa .
hypothesis: After his untimely death , Bin Ladin was forced to replace his roles in the Shura and in supervising cells in East Africa and true is true .