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"as, conjunction: used to indicate that something happens during the time when something else is taking place: Frank watched him as he ambled through the crowd | as she grew older, she kept more to herself."

So they're just trying to mention both big news items in the same headline. The casualty[sic] is all in your head.

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Maybe, but "as" also can be used in place of "because or since". Here is another headline from Reuters "Uber's finance head leaves; company's quarterly loss narrows". In my opinion, both the headlines provide a different slant to the same story.

P.S:- We both misspelled "causality", what a "casualty" :)

That use of "as" would require a comma: "they were free, as the case had not been proved."

P.S.: I noticed the misspelling of causality, which is was the [sic] was trying to indicate.

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