[cors-fls]

I love the 'usa' in every classes !

You can't forget where you come from when you are putting 'usa-checkboxes' into 'usa-fieldsets' into 'usa-forms' !

At least it's shorter than 'america' !

[oh_sigh]

It's just best-effort namespacing. Call it "checkboxes" and the library has a much higher chance of negatively interacting with a different library.