ON Thursday, August 27, 2015, I joined a long list of Nigerians in Lagos, for the hour-long flight to Douala, Cameroun, a city and country I have not visited in about 21 years. A few days earlier, I had received an invitation from Aliko Dangote to the commissioning ceremony of the $250 million dollar, 1.5 million metric ton cement plant, located at the Base ELF, Douala.