Submitted Photo Monte Yellow Bird Sr., left, well known in the art world as Black Pinto Horse, and Delphine Baker, executive director of the new MHA Nation Interpretive Center, are shown next to murals done by Yellow Bird. Yellow Bird installed the murals in the interpretive center on Tuesday. A grand opening of the interpretive center, west of New Town, is planned for May 19. The center will tell the story of the Mandan, Hidatsa and Arikara Nation.