Canadian Prime Minister Mark Carney (C) and Australian Defence Minister Richard Marles attend a Defence Science and Technology showcase at RAAF Defence Establishment Fairbairn in Canberra on March 5, 2026. (Photo by Hilary Wardhaugh / POOL / AFP via Getty Images)

Canadian Prime Minister Mark Carney (L) and Australian Defence Minister Richard Marles attend a Defence Science and Technology showcase at RAAF Defence Establishment Fairbairn in Canberra on March 5, 2026. (Photo by Hilary Wardhaugh / POOL / AFP via Getty Images)

Doctor Roland Keir (R) speaks with Canadian Prime Minister Mark Carney (C) as Australian Defence Minister Richard Marles and Australian Chief of Air Force Stephen Chappell and colleagues look on during a Defence Science and Technology showcase at RAAF Defence Establishment Fairbairn in Canberra on March 5, 2026. (Photo by Hilary Wardhaugh / POOL / AFP via Getty Images)

Canadian Prime Minister Mark Carney arrives at a Defence Science and Technology showcase at RAAF Defence Establishment Fairbairn in Canberra on March 5, 2026. (Photo by Hilary Wardhaugh / POOL / AFP via Getty Images)

Craig Hardie (R) speaks with Canadian Prime Minister Mark Carney as Australian Defence Minister Richard Marles (L) and Canadian Defence Minister David McGuinty look on during a Defence Science and Technology showcase at RAAF Defence Establishment Fairbairn in Canberra on March 5, 2026. (Photo by Hilary Wardhaugh / POOL / AFP via Getty Images)

Australian Defence Minister Richard Marles attends a Defence Science and Technology showcase at RAAF Defence Establishment Fairbairn in Canberra on March 5, 2026. (Photo by Hilary Wardhaugh / POOL / AFP via Getty Images)

CANBERRA, AUSTRALIA - MARCH 05: Canadian Prime Minister Mark Carney and Australian Minister for Defence Richard Marles attend a Defence Science and Technology showcase at RAAF Defence Establishment Fairbairn on March 05, 2026 in Canberra, Australia. Carney is in Australia to discuss trade and other matters. (Photo by Hilary Wardhaugh/Getty Images)

CANBERRA, AUSTRALIA - MARCH 05: Canadian Prime Minister Mark Carney (C) and Australian Minister for Defence Richard Marles (2nd R) attend a Defence Science and Technology showcase at RAAF Defence Establishment Fairbairn on March 05, 2026 in Canberra, Australia. Carney is in Australia to discuss trade and other matters. (Photo by Hilary Wardhaugh/Getty Images)