As the grand opening/unveiling/launch of Nigeria's Dangote Refinery draws nearer/closer/steadily, a shadow casts/looms/falls over the momentous occasion. The notorious Boko Haram militant group https://ronaldcqud476109.activoblog.com/34588445/a-looming-boko-haram-threat-looms-over-dangote-refinery-s-grand-opening