President Robert Mugabe and his closest ally yesterday launched a highly personal, orchestrated attack on Tony Blair, effectively hijacking the Earth Summit to blame Britain for Zimbabwe's crisis. "Blair, keep your England and let me keep my Zimbabwe," the 78-year-old leader declared to loud applause. His outburst - and an attack by his friend, Sam Nujoma, the Namibian president - dramatically upstaged Mr Blair's speech during a flying visit to the summit and his attempt to highlight Britain's commitment to environmental targets. Mr Mugabe had taken his seat at the Johannesburg conference to hear opening remarks by Kofi Annan, the...