This spring, we’re having discussions some of America’s most fascinating elder statesmen: older Americans who are long past retirement age, but who are nonetheless still working to change how we live and work in this country. We’re calling this series “In My Experience.” Today, our guest is screenwriter, novelist, essayist, playwright, and gay rights activist, Larry Kramer. The Broadway revival of his 1985 critically acclaimed play “The Normal Heart,” opened this week.