The US-led coalition launches about two combat aircraft sorties per hour against Islamic State, but how does that compared to previous aerial campaigns? In this audio visualisation the BBC’s Neal Razzell explores comparisons with the invasion of Iraq, WWII, and NATO’s bombing of Serbia in 1999.
First heard: On Background, BBC World Service Radio
Reporting: Neal Razzell; audio mix: James Beard; animation: David Botti
Editor: Richard Knight
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