Regardless of the countries in question, most of the time it feels like "if we do it, it is right. if you do, it isn't" is what is happening. In other words, "w

Regardless of the countries in question, most of the time it feels like "if we do it, it is right. if you do, it isn't" is what is happening. In other words, "we are always right, you are right when it suits us and not when it doesn't" How often do countries admit they were wrong? Especially powerful nations like the U.S or China?