WASHINGTON: The 22-year-old would-be-jihadist wrote to his reclusive father to say he was itching to join the fight. Hamza trained with explosives and embraced the terror network that killed 3,000 Americans in the September 11, 2001 attacks. But young Hamza was no run-of-the-mill jihadist recruit. He was the favorite son of 9/11 mastermind Osama bin Laden, who was grooming him to take over as al-Qaida’s leader, according to US intelligence […]