Nigeria's Arik Air has cut more than half its flights, amid worker strikes. Manji Cheto is a Nigeria business analyst with Teneo Intelligence, and tells us about Nigeria's struggling airline sector. Also in the programme, Israeli billionaire Beny Steinmetz has been put under house arrest over allegations of bribery in Guinea. Michael Zess is a business reporter with the Jerusalem Post, and explains the case. The BBC's Andrew Walker reports on a troubled solar energy experiment in Arizona. Plus we hear why intrapreneurs - innovators hidden within a company - might explain why many successful economies don't have high numbers of start-up businesses. Michael Drexler co-authored a report on the subject for the World Economic Forum.