JOHANNESBURG (AP) — Zimbabwe's former leader Robert Mugabe and his wife, Grace, have traveled to Singapore on their first trip abroad since Mugabe resigned last month under pressure from the military and ruling party, the presidential spokesman said Tuesday. Mugabe, 93, has gone on his annual leave and for routine medical checkups, spokesman George Charamba told The Associated Press. "The former president is free to travel when and where he needs," said Charamba, who said this should dispel some reports that Mugabe had remained under house arrest.