Natives of the Bolivian Amazon march against a project to build a highway through a national park

Natives of the Bolivian Amazon lowlands start marching from Trinidad, in northeastern Bolivia, to La Paz on April 27, 2012 to press the government of President Evo Morales to cancel a project to build a highway through the Isiboro Secure National Park and Indigenous Territory (TIPNIS), an Amazon ecological reserve. (IMAGES)