article: It is one of the oldest tools in the book to get rid of someone who is either too powerful, too dangerous or too inconvenient. But most assassins choose a straight-forward method: Julius Caesar was stabbed to death, Abraham Lincoln was shot. It is now being speculated that the death of Kim Jong-nam - Kim Jong-un's oldest half-brother - may have been another one. If that proves true, its rumoured method - which supposedly saw two female assassins placing a poison-laced handkerchief over his mouth as he walked through the airport - puts his assassination among a select list of those killed by people who have chosen a more unusual route. Alexander Litvinenko's death is arguably the most high profile assassination of recent years. The former KGB agent became ill on 1 November 2006, hours after having tea at the upmarket Millennium Hotel in Mayfair with two fellow former agents. After his death, those agents would become the main suspects in his murder. When Mr Litvinenko was admitted to hospital on 3 November, he told doctors he had been poisoned. Later, he would personally name Russian President Vladimir Putin, saying he was responsible for "everything that happened to him". Meanwhile, his hair began to fall out and his organs began shutting down - but doctors at London's University College Hospital could not find a cause. Eventually, it fell to scientists at Britain's top-secret nuclear research site at Aldermaston in Berkshire to discover what was killing Mr Litvinenko from the inside: Polonium 210, a particle which was used in the first nuclear bombs, and is 100% deadly. There was nothing doctors could do. Mr Litvinenko, who told the BBC's Russia service he had been looking into the assassination of Russian journalist Anna Politkovskaya the previous month when he was attacked, died on 23 November. Bulgarian dissident Georgi Markov was waiting for a bus on Waterloo Bridge on 7 September 1978 when he felt a stab in his thigh. Mr Markov, 49, looked back to see a man with an umbrella running away and taking a taxi. It was only later, after finishing a day's work for the BBC's Bulgarian service and having returned home to south London, that he became unwell. Mr Markov, an opponent of Bulgaria's then-Communist government, died four days later. He had, officials later discovered, been poisoned with ricin which appeared to have been injected into his thigh, possibly by the umbrella. No one was ever charged with his murder, one of the most notorious of the Cold War, but Mr Markov had his own theories, telling doctors he believed the KGB had played a role in the attack. JÃ¶rg Jenatsch was a one-time preacher who went on to be a politician and leading figure during Switzerland's 30 Year War. But for all his achievements in life, it is probably Mr Jenatsch's death in 1639 in a hostel in Chur which is most memorable. Mr Jenatsch, who had recently been knighted for his services, was having a party during the town's carnival when a group turned up and asked to
summary: There is nothing new about a high-profile or outspoken person being assassinated.