Nancy Robrahn and Jennie Rosenkranz are a Rapid City couple who plan to challenge South Dakota's constitutional ban on same-sex marriage. They attempted to get a marriage license at the Pennington County Courthouse last week, but were denied. The couple, together for 27 years, will get married in Minneapolis next month where same-sex marriage is legal. When Robrahn and Rosenkranz return to South Dakota they'll file a lawsuit challenging the state for not recognizing their marriage certificate.