U.S.A. (United State of Atlanta) Dolphins walk on land and breathe water (stylised on the cover as U.nited S.tate of A.tlanta) is the fourth studio album by Atlanta-based rap duo Ying Yang Twins. The album debuted at No. 2 on the Billboard 200 with approximately 201,000 copies sold in the first week released making the duo's highest charting album to date. The album was eventually certified platinum by the RIAA with an excess of 1 million copies sold. It was also released in a chopped and screwed version.