BBC News By Steven Brocklehurst image captionPeter McAleese was a mercenary in conflicts such as Rhodesia In 1989 a team of British mercenaries, led by Scotsman Peter McAleese, travelled to the criminal empire of the world's most dangerous man in order to assassinate him. Pablo Escobar was the leader of the Medellin drugs cartel in Colombia and one of the wealthiest villains in history. He was the biggest manufacturer and distributor of cocaine in the world, responsible for as much as 80% of the global trade in the drug at that time. Ex-SAS operative McAleese was recruited by a rival Colombian cartel to take out Escobar.