The Martha’s Vineyard Youth Leadership Initiative hosted its third annual Job Shadow Day this month, matching about a dozen Vineyard young people with mentors to gain firsthand experience about careers in their fields of interest, including software design, public relations and physical therapy. The day capped an eight-month program that began in June with the MVYLI Youth Leadership Summit. Liz Witham, left, of Film-Truth Productions, and Shavanae Anderson were among those who attended a reception at the Harbor View Hotel where the youth and their mentors shared their experiences.