“We have a serious problem with experienced pilots.”
http://ru.krymr.com/a/28191568.html
http://ru.krymr.com/a/28191021.html
http://www.ng.ru/armies/2016-12-22/2_6893_putin.html
http://ru.krymr.com/a/28187658.html
http://www.kommersant.ru/doc/3176344
http://expert.ru/2016/12/21/u-atomnogo-voennogo-flota-rossii-poyavitsya-lider/
It was the bloodiest day for the Ukrainian military in five months.
https://www.gazeta.ru/army/2016/12/20/10439849.shtml
http://inosmi.ru/military/20161220/238424841.html