A pillar of black smoke rises from a fire at a chemical plant in the Canberra industrial area of Mitchell. Emergency services battled a huge chemical fire in the Australian capital Canberra but authorities said the threat from toxic smoke plumes was diminishing. Residents were woken by loud explosions and fireballs as flames leapt hundreds of metres into the air.
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Each week, we pick a different topic and ask users to share their photos with us. Then we pick the best image and display it online and in The Baltimore Sun with a critique from director of photography Robert Hamilton