The United States National Transportation Safety Board, NTSB, has released images of the site where the helicopter carrying Access Holdings Chief Executive Officer, Herbert Wigwe and others crashed. The Airbus EC130 helicopter crashed close to the California-Nevada border near Halloran Springs, killing Wigwe, his wife Doreen, their son Chizi Wigwe and former Nigerian Exchange Group Chairman Abimbola Ogunbanjo. The images by NTSB showed investigators combing through wreckage at the site. Recall that Michael Graham, a board member with the NTSB, provided an update on Sunday when he said they had…