Adm. Christopher Grady, vice chairman of the Joint Chiefs of Staff, views the Navigation Seamanship Surface Trainer during a tour of the Mariner Skills Training Center Atlantic, June 7, 2023. (U.S. Navy photo by Mass Communication Specialist 1st Class James D. Mullen) US military publishes new joint warfighting doctrine "It marks a distinctive paradigm change," Vice Chairman of the Joint Chiefs of Staff Adm. Christopher Grady said at AFA’s Air, Space and Cyber conference. Sep 13, 2023 By Jon Harper