PUTLOS, Germany (June 11, 2021) Members of the Office of Naval Research test the Magnetic Expeditionary Threat Locator for accuracy in detecting materials in shallow water as part of BALTOPS 50. The 50th BALTOPS represents a continuous, steady commitment to reinforcing interoperability in the Alliance and providing collective maritime security in the Baltic Sea. (U.S. Navy photo by Mass Communication Specialist 1st Class Christopher Hurd)