[StavrosK]

Yes, the US, Liberia and Myanmar.

[donatj]

All the countries that have been to the moon, and more!

[perilunar]

As Tom Lehrer famously sang:

"And what is it that will make it possible to spend twenty billion dollars of your money to put some clown on the moon? Well, it was good old American know how, that's what, as provided by good old Americans like Dr. Wernher von Braun!"

[opinionator1]

Cute, but most of the former British empire (including Britain itself) still uses parts of it.