People participate in a march in Mexico City called out by poet Javier Sicilia after the death of his son whose body was found along with six other dead people inside a car a week ago in Cuernavaca, April 6, 2011. Nationwide protests against Mexican President Felipe Calderon's war on drug cartels that has claimed more than 37,000 lives since late 2006 were planned all over Mexico and cities as far afield as Buenos Aires, Paris, New York and Barcelona. The stickers read "Not one more." REUTERS/Carlos Jasso (MEXICO - Tags: CIVIL UNREST CRIME LAW POLITICS SOCIETY)