-Down Syndrome Organization of Southern Nevada (DSOSN), the leading nonprofit organization and primary source of education, information, and support for Southern Nevada families with Down syndrome and other Intellectual and Developmental Disabilities (IDD), will celebrate its 35th anniversary at this year’s Festival of Trees and Lights Gala beginning at 5:30 pm on November … [Read more...] about Down Syndrome Organization of Southern Nevada to Celebrate 35th Anniversary at Annual Festival of Trees and Lights Gala, Nov. 19