Marina Popovich spoke about her experience with UFOs in her book titled "UFO Glasnost" (published in 2003 in Germany) and in public lectures and interviews. She claimed that the Soviet military and civilian pilots had confirmed 3000 UFO sightings and that the Soviet Air Force and KGB had recovered fragments of five crashed UFOs. The crash sites were Tunguska (1908), Novosibirsk, Tallinn, Ordzhonikidze and Dalnegorsk (1986).