Omar Farah

As Gulf oil wealth flows to all corners of the globe - backing mega mergers, propping up economies and upending the world of sport - moves by a key member of Abu Dhabi's ruling family have positioned him as one of world's most influential dealmakers.

U.S. Justice Department lawyers on Friday blocked a legal request that a Guantanamo Bay detainee who weighs just 74 lbs (33.5 kg) after an eight-year hunger strike be released for health reasons.

As Gulf oil wealth flows to all corners of the globe - backing mega mergers, propping up economies and upending the world of sport - moves by a key member of Abu Dhabi's ruling family have positioned him as one of world's most influential dealmakers.

U.S. Justice Department lawyers on Friday blocked a legal request that a Guantanamo Bay detainee who weighs just 74 lbs (33.5 kg) after an eight-year hunger strike be released for health reasons.