In this article for US Northern Command’s magazine, The Watch, Dr. William Godnick describes the contours and challenges faced at the United States’ "third border" in the Caribbean, specifically the multi-island state of the Bahamas. Dr. Godnick outlines the long-standing bilateral relationship between the United States and the Bahamas and how increased Chinese investment presents a new set of challenges for the relationship. He calls for re-thinking how security cooperation relationships should be forged with high, middle-income countries to avoid security gaps in our shared neighborhood.