Former Military Head of State, Yakubu Gowon, says Boko Haram has been a major threat to Nigeria’s existence after the civil war. Gowon said Boko Haram had created a major problem in Nigeria. He spoke in Abuja yesterday during the launch of two books written by Nigeria’s Ambassador to Russia, Professor Abdullahi Y. Shehu. According to Gowon: “Boko Haram has been a threat, perhaps the major threat to the peace and development of Nigeria after the civil war. “Boko Haram has indeed created a serious problem. After the Civil War, l remember saying, I hope that we will not experience what we went th…