Border police officers wait as farmers prepare a barbeque during a blockade of a road near Gualeguaychu City March 29, 2008, to demonstrate against Argentine President Cristina Fernandez de Kirchner. Argentine farm groups revived their 17-day-old nationwide protest on Saturday after a brief truce for talks with the government failed to resolve differences over soy export taxes. REUTERS/Andres Stapff (ARGENTINA)