In the documentary “TRANS,” director Chris Arnold set out to tell the world the truth about transsexuals. “It’s not a lifestyle. It’s not a choice. In fact, it’s a very, very hard road to travel,” Arnold says. “I call (transsexuality) the last frontier in civil rights.” Arnold’s film, which depicts the stories of six transsexual people at different points in their lives, will be screened Saturday at The Gay and Lesbian Community Center of Southern Nevada, 401 S. Maryland Parkway. He will also be on hand for a question-and-answer session.