The Nigerian army has cleared a major road that links the country to Cameroon and Chad after wrestling control from the Islamist militant group Boko Haram, according to military spokesman Colonel Sani Kukasheka Usman. Dignitaries — including the Borno State governor, Alhaji Kashim Shettima; Chief of Army Staff of Nigeria, Lieutenant General Tukur Yusuf Buratai; and…