Three Russian men passed away in 2013, as detailed in three questions. Mikhail Kalashnikov designed the famous AK-47 assault rifle and passed away on December 23, 2013. Ilya Segalovich founded Yandex, Russia's largest search engine, and passed away on September 27, 2013. Rem Viakhirev was the former chairman of Gazprom, Russia's largest natural gas company, and passed away on February 11, 2013.