The killing of Saif al-Islam Gaddafi, the most prominent surviving son of former Libyan dictator Muammar Gaddafi, removes a figure who commanded symbolic influence among some Libyans, even as he was reviled by others as the representative of a hated regime. The 53-year-old, killed on Tuesday in the western Libyan town of Zintan, was an alternative to the country's current power duopoly, split between the United Nations-recognised government in the capital, Tripoli, and the so-called Libyan National Army in the east of the country.