More than 20 people have been arrested in a number of Columbian cities in what the authorities describe as the biggest anti drugs operation in a decade. <br/><br/>Police say some of the suspects provided the link between Columbian drug world and Mexico's powerful cartels responsible for most of the supplies of illegal drugs to the United States. <br/><br/>What has been described as operation frontiers was two years in the planning. It involved thirtyfive separate investigation teams and the result is they have resulted in the arrest of at least 21 alleged drugs traffickers.<br/><br/>The Columbian police say three of those captured are links between the Columbian drugs world and Mexico's most wanted man called Gussman.<br/><br/>Among those arrested were 12 professional pilots believed between them to have been running some of the principal smuggling routes in Central America. Responsible for countless flights carrying multi ton load of cocaine.