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SEYMOUR, AUSTRALIA - MAY 09: A M1A1 Abrams main battle tank fires during Exercise Chong Ju at the Puckapunyal Military Area on May 09, 2019 in Seymour, Australia. Exercise Chong Ju is an annual live fire training exercise and demonstration at the Australian Army's Combined Arms Training Centre showcasing Army as a versatile, decisive force. (Photo by Scott Barbour/Getty Images)The proliferation of Russian drones on the Ukrainian battlefield means "there isn't open ground that you can just drive across without fear of detection," a senior defense official told reporters Thursday.
Originally published at The Associated Press