HARARE, Zimbabwe (AP) — The opposition said Friday that its rallies had been banned indefinitely three weeks before the presidential runoff, while the U.S. ambassador accused President Robert Mugabe's regime of using food as a weapon to stay in power. U.S. Ambassador James McGee said the regime is distributing food mostly to its supporters and that those backing the opposition are offered food only if they hand in identification that would allow them to vote. If the situation continues, "massive, massive starvation" will result, McGee told reporters in Washington by video conference from Harare. Aid groups in Zimbabwe were ordered...