UNION SQUARE, Manhattan (WABC) -- A non-verbal child with autism who went missing in Union Square has been reunited with her family.Police say someone found 13-year-old Alexandra Zablan on a train at the Utica Avenue subway station in Brooklyn, nearly seven miles away from where she disappeared.Lexi slipped away from her parents around 3:30 Saturday afternoon outside the Whole Foods on 14th Street.----------