By Ndahi Marama, Maiduguri MAIDUGURI — Troops of the Joint Task Force North-East, Operation Hadin Kai (OPHK), in collaboration with the Office of the National Security Adviser (ONSA) Tactical Team, have killed more than 20 Boko Haram/ISWAP terrorists and destroyed their camp in Hong Local Government Area of Adamawa State. Several other terrorists reportedly…