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://joanolzb669104.tusblogos.com/32659998/a-looming-boko-haram-threat-looms-over-dangote-refinery-s-grand-opening