Here's video of James Mattis wearing a mask, urging others to do the same and saying: "Over the course of my career, I’ve learned that divisiveness will never work in defeating an enemy."

Here's video of James Mattis wearing a mask, urging others to do the same and saying: "Over the course of my career, I’ve learned that divisiveness will never work in defeating an enemy." pic.twitter.com/fOYLnS6Iqn

— Mike Baker (@ByMikeBaker) June 26, 2020