A leading defence industry exhibition opens in Perth today, with outlets reporting that a heavy police presence is expected.

All three reports describe the event as controversial and note the same broad security expectation as it begins. The coverage focuses on policing arrangements rather than detailing specific activities at the expo.

While the sources agree on the timing of the opening and the anticipation of a significant police presence, they do not provide further shared details in the excerpts supplied. As a result, differences in emphasis beyond the common facts cannot be assessed from the provided text alone.