After years of food shortages and drought, in a country that was once the breadbasket of southern Africa, Zimbabwe's crippled economy is recovering — after adopting the U.S. dollar as its currency. But memories of the violent elections in 2008 are fueling fears about security. The disputed vote ended in a power-sharing deal between President Robert Mugabe and his main opposition rival. The Zimbabwean leader has now proclaimed July 31 as election day. New York-based Human Rights Watch warns there's potential for more violence — unless key security and other reforms are brought in before the vote.