Decades after an atomic bomb exploded on remote islands off Western Australia's coast, ex-serviceman Jim Marlow can still picture what he saw from 10 kilometres away.
"It frightens the s**t out of you because you couldn't say you expected it because you didn't, you didn't know it was coming," he said.
"A loud bang followed by a rumble … and you see the smoke [and] sand starting to build up and it goes up and up and up and lines the sky."