Since the late 20th century, the two tribal councils have authorized the development of gambling casinos to generate revenues to support economic development, infrastructure, health care and education. The Ho-Chunk Nation is working on language restoration and has developed a Hocąk-language "app" for the iPhone. Since 1988, it has pursued a claim to the Badger Army Ammunition Plant as traditional territory; it has since been declared surplus, but the Ho-Chunk have struggled with changes in policy at the Department of the Interior. It supported their claim in 1998 but in 2011 refused to accept the property on their behalf.