Just got fired for discussing wages and opinions of the company with other employees. I caught their explanation on tape. What do I do now?

Hi everyone, I (used to) work at a local non-profit and was recently fired with them citing talking about wages with employees as part of the decision. I have the discussion recorded, and will transcribe it soon – but in the meantime what do I do? Who do I report this to? (Also can I get unemployment?) I live in Iowa btw. Thanks for any help in advance.