Students from the General Yermolov Cadet School attend a military tactical exercise on the ground, which includes intrenchment training, forest survival studies and other activities, outside the southern city of Stavropol, Russia, October 21, 2017. Picture taken October 21, 2017. REUTERS/Eduard Korniyenko/File Photo SEARCH "POY DECADE" FOR THIS STORY. SEARCH "REUTERS POY" FOR ALL BEST OF 2019 PACKAGES. TPX IMAGES OF THE DAY.