Video - Africa's richest man Aliko Dangote committed to investment in Tanzania, if gas prices are cut

Nigerian billionaire Aliko Dangote says he's committed to investing in Tanzania -- despite halting production at his cement factory over energy costs. President John Magufuli has invited him to Dar es Salaam to broker a solution, saying Dangote could buy gas directly from the state supplier. But as Dan Ashby reports, there may be more problems ahead.