The Ghana Mineworkers rsquo; Union (GMWU) on Tuesday, December 12, held its 13th Quadrennial Delegates Conference at the AngloGold Ashanti Junior Staff Club House in Obuasi, Ashanti Region. Delivering an address at the Conference, GMWU General Secretary Abdul-Moomin Gbana raised concern about several challenges facing the Union and the other Trade Unions in the country.