Bujumbura, formerly Usumbura, is the economic capital, former political capital, largest city and main port of Burundi. It ships most of the country's chief export, coffee, as well as cotton and tin ore. Bujumbura was formerly the country's political capital. In late December 2018, Burundian president Pierre Nkurunziza announced that he would follow through on a 2007 promise to return Gitega its f…