![](http://www.alamy.com/thumbs/6/FAB29FC0-FB32-44FA-81DF-81DF9A94EEC5/2GK66M2.jpg)
Overcast skies are visible behind Humvees, assigned to observer coach/trainers with 4th Cavalry Multi-Functional Training Brigade, at Combat Support Training Exercises 78-21-04 on Aug. 12, 2021 at Fort McCoy, Wisconsin.
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