Reuters
South Korean and U.S. Marines take part in a winter military drill in Pyeongchang, South Korea, December 19, 2017.
US and South Korean Marines conducted their annual winter exercises this week in Pyeongchang, South Korea.
Pyeongchang will soon host the 2018 Winter Olympics.
The drills included winter patrols on foot and on skis, physical conditioning, and team building exercises in the snow - and mostly without shirts.
We put together the best shots taken of the event: