Supporters of Bolivian President Evo Morales block a route with burning tyres in San Julian some 160 km (99 miles) northeast of Santa Cruz May 3, 2008. Bolivia's simmering political crisis enters a decisive phase over the weekend as some of its richest vote in an autonomy referendum, either prompting conflict with the central government, or forcing it onto a path of reconciliation. REUTERS/David Mercado (BOLIVIA)
REUTERS/DAVID MERCADO