The United States, Britain and Australia are working together to develop unmanned undersea vehicles as part of their trilateral AUKUS defense pact , U.S. Secretary of Defense Pete Hegseth told reporters on Saturday. AUKUS said in a joint statement that delivery of the vehicles will start in 2027. The program will improve the three nations' reconnaissance and strike capabilities, "and bolster superiority in anti-submarine and anti-surface warfare, mine countermeasures, electronic warfare, and