Zambians vote in special presidential election

Zambia goes to the polls Tuesday in a tightly contested race to elect a president after a ruling party power struggle following the death of Michael Sata in office last year.

The two top contenders are Defence Minister Edgar Lungu, 58, representing the ruling Patriotic Front (PF), and opposition candidate Hakainde Hichilema, 52, of the United Party for National Development (UPND).

At stake are the remaining two years of Sata's five-year term in Africa's second biggest copper producer, where new taxes on the metal have become a surprising election issue.