Members of the "Spasatel" (Rescuer) state regional search and rescue service group dive with scuba equipment to a depth of 20 metres (66 feet) in the Yenisei River during a training session, with air temperature at about minus 20 degrees Celsius (minus 4 degrees Fahrenheit), outside the Siberian city of Krasnoyarsk, Russia, December 22, 2015. REUTERS/Ilya Naymushin