Osama or Usama?

Why is FOX now saying it is “Usama” when before has stated “Osama”? Which is it really? USAma gives him USA at the beginning of his name – or – Osama is just one letter away from Obama. Is that why? C’MON FOX!!!!

Though Fox seems to be the only news source that uses this particular spelling, it is also the spelling preferred by United States intelligence agencies. The FBI’s “Most Wanted List,” now updated to reflect bin Laden’s death, has the name spelled “Usama.”