A Costa Rican policemen stands guard as a Caribou plane takes off at the Barra del Colorado Sur in the border with Nicaragua, on October 24, 2010. Both countries are deploying forces along the border following tensions regarding the dredging of the San Juan river. Costa Rican authorities accused the neighbouring country of dumping sediments on their side while residents of the area have reported Nicaraguan intrusion. AFP PHOTO/Yuri CORTEZ (Photo credit should read YURI CORTEZ/AFP/Getty Images)