By Brandy McDonnellSmithsonian magazine has designated Saturday as the 15th annual Museum Day, an initiative in which participating museums across the United States open their doors for free to those who download a branded ticket. The annual event allows museums nationwide to emulate the spirit of the Smithsonian Institution’s Washington, D.C.-based facilities, which offer free admission every day.Museum Day represents a nationwide commitment to access, equity and inclusion.Read more on NewsOK.com