Kiev, UKRAINE:  A widow places portraits of vicitims during a ceremony at the Chernobyl memorial in Kiev 14 December 2006 to mark the Day of Liquidators, who worked on the plant following the world's worst nuclear accident in 1986. Getty Images logo Getty Images 66 months ago

Kiev, UKRAINE: A widow places portraits of vicitims during a ceremony at the Chernobyl memorial in Kiev 14 December 2006 to mark the Day of Liquidators, who worked on the plant following the world's worst nuclear accident in 1986.