Alexander Burinin, left, former Chernobyl liquidator, his wife Olga and grandson Georgy visit Mitino Cemetery in Moscow, Russia, Tuesday, April 26, 2016 on the 30th anniversary of the explosion at the Chernobyl nuclear plant. About 600,000 people, often referred to as Chernobyl’s “liquidators,” were sent in to fight the fire at the nuclear plant after an explosion on April 26, 1986. (AP Photo/Pavel Golovkin)