Australian Defence Minister Peter Dutton has warned against imposing a no fly-zone over Ukraine, saying such a move would only help “if it didn’t lead to a nuclear conflict.” It comes after Ukrainian President Volodymyr Zelensky criticised NATO for refusing to create a no-fly zone to stop Russia’s escalating attacks from the air, which he said would give “the green light to the bombing of Ukrainian cities and villages.” Speaking in an interview with the ABC’s Insiders program on Sunday, Dutton argued that a no fly-zone, which would ban unauthorised aircraft from flying over Ukraine, “would bring catastrophic results not only to Europe but to the whole world.” “The difficulty here is if you provide more support and surge with troops … or you allow planes to be staged out of Poland or somewhere else, what is the next step and what is Putin’s next play?” Dutton said. “He is …