NTSB

 Accident reveals 1.5 ft deep, 12 ft long 10 ft wide ground crater NSIB actively engaging US probe agency Adverse weather, snow mix also fingered   The Nigerian Safety Investigation Bureau (NSIB) said it has received a preliminary report from the National Transportation Safety Board (NTSB) of the accident involving Airbus Helicopter EC130B4 in which former Access Bank’s Group Chief Executive Officer, Herbert Wigwe, his wife Doreen, son, Chizi and former Chairman of the Nigerian…