Saudi Arabia’s uber-wealthy Bin Laden family survived the fallout from the September 11, 2001 attacks in the US, but their fortunes nose-dived with the meteoric ascent of Crown Prince Mohammed bin Salman. A decade after the killing of 9/11 mastermind Osama bin Laden, disowned and labelled the “black sheep” of the family, the construction empire founded by his father is saddled with crushing debt.