Have you ever had to do something mean in order to advance your career?

Climbing the corporate ladder is a bitch. I had to fire the gal who hired me and trained me. She was a redhead and somewhat of a cougar. She had a drinking problem. I thought the third round was unusual for a corporate lunch on my final interview at first but she held her liquor well. She set a lunch with me for no reason. I thought I was getting fired. Two hours before the lunch, I got another call from our VP ops offering me the job. She was going to fire me because she was trying to keep me from replacing her. I went to the lunch and fired her instead.