Carlos Slim tops Forbes rich list

Mexican tycoon Carlos Slim has once again come top of Forbes magazine's annual list of the world's richest billionaires.
The magazine estimates that Slim, whose business interests range from telecommunications to construction, is worth $69bn.
He is followed by Microsoft founder Bill Gates on $61bn, and US investor Warren Buffett on $44bn.
Slim, 72, has now topped the list for three years in succession.
Mukesh Ambani, Indian business tycoon, has topped the list in India. Ambani, 54, has amassed a $22.3bn fortune and is ranked 19th in the global rich list, the magazine said.