In 2002 there were 170 attacks on the 2nd largest pipeline, which travels 780 km from the Caño Limón to the Atlantic port of Coveñas. The pipeline was out of operation for 266 days of that year; the government estimates that these bombings reduced Colombia's GDP by 0.5%. The government of the United States increased military aid, in 2003, to Colombia to assist in the effort to defend the pipeline. Occidental Petroleum privately contracted mercenaries who flew Skymaster planes, from AirScan International Inc., to patrol the Cano Limon-Covenas pipeline. Many of these operations used helicopters, equipment and weapons provided by the U.S. military and anti-narcotics aid programs.