Osama bin Laden's son-in-law was charged today with conspiring to kill Americans in his role as al-Qaeda's top propagandist. Sulaiman Abu Ghaith, who was captured in the Middle East last week, will appear tomorrow in US federal court in New York. His trial will mark one of the first prosecutions of senior al-Qaeda leaders on US soil. The case marks a legal victory for the Obama administration, which has long sought to charge senior al-Qaeda suspects in American federal courts instead of holding them at the military detention center at Guantanamo Bay.