By Chiwanza Nachalwe, Brian Mwale: Voting has closed in the Lukashya and Mwansabombwe parliamentary by-elections. Polling stations closed at 18 hours. ZNBC’s Chiwanza Nachalwe reports from Lukashya that District Electoral officer Zakeyo Mbao has described the voter turnout as impressive. Mr. Mbao said none of the polling stations have recorded any incidence of violence. And…