A native Bolivian from the Isiboro Secure indigenous territory and national park, known by its Spanish acronym TIPNIS, clashes with police as he and dozens of others break away from police custody to block the airport runway as they were being forced to board a plane and return towards their homeland in Rurrenbaque September 26, 2011. The natives were in the middle of a 370-mile (595-km) protest march from Trinidad in the northern lowlands to the government seat in La Paz, against a projected 185-mile (298-km) long highway that bisects the TIPNIS, when President Evo Morales ordered police to intervene and stop the march on Sunday. A large group of dozens of protesters managed on Monday to break away from police custody at Rurrenbaque airport and block the runway with burning wood and tires as they repelled attempts by the police to contain them. REUTERS/David Mercado (BOLIVIA - Tags: POLITICS CIVIL UNREST ENVIRONMENT)