On 12 August, Zambians go to the polls to vote in their next president. Zambia’s ruling party, the Patriotic Front, confirmed Edgar Lungu in April as its candidate in this year's polls. With electoral campaigns now open since 21 May, 19 candidates have so far presented themselves as contenders against Lungu. But one man in particular is looking to take over from the incumbent president. He's hoping the sixth time will be a charm. In this week's Talking Africa, we speak to Hakainde Hichilema, Zambia's main opposition candidate, of the United Party for National Development. For more, head to www.theafricareport.com