To which countries that have different idea about using them? So far there's only two camps - the US who has used them on civilians on purpose, and everyone els

To which countries that have different idea about using them? So far there's only two camps - the US who has used them on civilians on purpose, and everyone else who have not used them. Most countries aiming for them want them to prevent American(and maybe Russian ones too now) invasions like what happened in Iraq.