Layoff notice, what does the 60 days mean? - 10 months and counting

Our team was told about a closure date that is 21 weeks away. I am in Tulsa, in case local advice matters. Some colleagues are already leaving. Has anyone been through this?

Thanks for writing this out. I went through something close to it 10 months ago, and it settled down once I kept a simple log of every call and form.