A major Nigerian banker, his wife, son and a notable Nigerian lawyer were among the six people killed in a helicopter crash in the California desert, authorities said Sunday. Banker Herbert Wigwe, 57, was killed alongside his wife and son, according to Ngozi Okonjo-Iweala, Director General of the World Trade Organization. The crash also killed Abimbola Ogunbanjo, a prominent Nigerian attorney and businessman. The three family members were traveling to the Las Vegas area to watch Super Bowl LVIII, according to Nigerian media. The group was traveling on a chartered helicopter from Palm Springs, …