Sergey Prokudin-Gorsky
Sergey Mikhaylovich Prokudin-Gorsky (, ;  – September 27, 1944) was a Russian chemist and photographer. He is best known for his pioneering work in colour photography and his effort to document early 20th-century Russia.
Igor Sergun
Two days after his death, the U.S.-based global intelligence company Stratfor questioned the official version of Sergun's death citing an unattributed report that alleged he had died on New Year's Day in Lebanon. In early March 2016, a similar theory was suggested by the Lebanese daily "Al Akhbar" that alleged Sergun was killed when on a visit to Beirut in a "complicated secret mission" carried out by unnamed Arab and Middle Eastern intelligence agencies. His death was cited as one in a series of "dozens of high-profile" Russian officials' (as well as Putin critics') sudden deaths, such as Vitaly Churkin's (February 2017), in "the past three years in Russia and abroad in suspicious circumstances" in a publication by "USA Today" of 2 May 2017. The Kremlin spokesman Dmitry Peskov dismissed such media reports as rumours.