This week, a U.S. surveillance drone was forced to be ditched into the Black Sea by a Russian pilot, raising questions about the security of the region and the safety of future drone flights. The incident has put a deal to let critical supplies of grain exit Ukraine’s ports on the Black Sea in jeopardy, and has drawn attention to the body of water that has been at the heart of the war in Ukraine. The U.S. must now consider how to respond to this incident and how to protect the Black Sea from further aggression.