Osama bin Laden's son has vowed revenge on the west for killing his father and is set to become the next leader of al-Qaeda, a former FBI agent has warned. Ali Soufan, who was the FBI's lead investigator of al-Qaeda after the 9/11 terror attacks, examined documents seized from bin Laden's Pakistan compound when he was killed by US Navy Seals in 2011. "I consider myself... to be forged in steel," Hamza bin Laden, now thought to be around 28 wrote.



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