Saying "Peace" to a friend or acquaintance upon parting is/was a way of saying "May nice things happen to you" or something like that. Also, having separate greetings or partings than most people is a way for people to identify themselves as part of a particular group and set themselves apart from everybody else.
Sixty Minutes is a television show in the USA. If you are on Sixty Minutes you are on that TV show.
Student or Learner