Trelew (, from "town" and the name of the founder, Lewis Jones) is a city in the eastern part of the Chubut Province of Argentina. Located in Patagonia, the city is the largest and most populous in the low valley of the Chubut River, with 97,915 inhabitants as of 2010. The Trelew municipality is part of the Rawson Department, whose capital, Rawson, is also the provincial capital. Trelew is an important commercial and industrial centre for the region and is the main hub for wool processing, accounting for 90 percent of activity in Argentina. The produce of this industry is mainly shipped and exported through Puerto Madryn and Puerto Deseado. Trelew is home to the Museum of Paleontology Egidio Feruglio, showcasing the paleontological heritage of the Patagonic region, and considered one of the most important of its kind in South America and the Astronomic and Planetary Observatory. The city is served by the Almirante Marcos A. Zar Airport, of both civilian and military use. The airport's runway is shared with the Almirante Zar Naval Base, home of the Lockheed P-3 Orion squadron of the Argentine Naval Aviation. History Trelew's foundation is linked with Welsh settlement in Argentina, the leaders of which were Captain Sir Thomas Duncombe Love Jones-Parry (of Madryn) and Lewis (Luis) Jones, who acted as spokesmen to deal with the Argentine government in the beginning of the 1860s. The town was named Trelew in honour of the latter Jones: tre meaning "town" in Welsh and "Lew" being an apocope for Lewis. Trelew was established on 20 October 1886 as the starting point for the Central Chubut Railway line that would link the lower Chubut River Valley to Puerto Madryn. Railway building equipment and 400 settlers arrived on July 28 of that same year on the steamer Vesta. The line was opened in 1888 and later extended from Trelew to Gaiman, Dolavon and finally to Las Plumas. In 1961, the line was closed. 1972 massacre Trelew was the scene of a massacre in 1972. A breakout of political prisoners at the federal penitentiary resulted in the death of one guard and the attempted flight of about 100 individuals who opposed the military dictatorship which followed the overthrow of President Arturo Illia. A small group of prisoners succeeded in commandeering a plane and flying to safety in Chile. The rest submitted to the authorities and were returned to a military