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://qasimtcdc545043.theobloggers.com/38748351/the-boko-haram-threat-looms-over-dangote-refinery-s-grand-opening