The image was created before 1 January 1955. The Australian Government's authoritative guide to the Copyright Act 1968 (Short Guide to Copyright, November 2016) states on page 11 that "The term of copyright protection for photographs taken before 1955, regardless of whether the author has since died or is still alive, has expired".
The image is in the public domain in the United States, as specified in the following panel.
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Captions
A battlefield photograph taken during World War I by Frank Hurley that was later incorporated, with another, into a composite image