Mar del Plata, Argentina, Nov 4 (EFE).- A Nobel laureate and a leftist Bolivian presidential candidate - but not, as had been promised, an Argentine soccer icon - led a march of thousands of anti-U.S. protesters through the streets of this seaside resort city Friday, hours before the inauguration of the Summit of the Americas. Retired athlete Diego Maradona, who had vowed to lead the demonstration to "repudiate" the presence of U.S. President George W. Bush, was in town but did not join the vanguard of the marchers. The explanation provided was that the former captain of the national soccer...