There are thousands of t-shirts, mugs, and memes of the now-iconic red-and-white “Keep Calm and Carry On” poster, and even more parodies of the phrase: “Keep Calm and Kill Zombies ...

Polish Prime Minister Donald Tusk on Tuesday told European leaders to “KEEP CALM AND CARRY ON” amid tensions in the U.S.-Ukraine relationship “To all the European leaders: KEEP CALM AND ...