I was asked to train a new person on the same project as I was working on, and then last friday, my Managers's Manager (the Director) called up a meeting saying that this was to catch up my performance, later called on the HR, and sent me a note saying this would be for reviewing my performance and will be formal meeting. Then issued me a layoff notice citing that I am unfit with the org culture. I am over 40 years having over 25 years of experience in my line of work, and feel that I have been discriminated against. I have copy of emails where the Director called up the meeting and later changed it to a formal review. I have never had a single meeting with my immediate manager, not even a single email exchange. My request to meet the director was turned down by him earlier. Can I sue?