Inside Ukraine's 'Kill Zone' where soldiers face swarming drones in new age of war
The 'Kill Zone' runs along the 750-mile front between Ukraine and Russia and is about 20 miles wide.
It's likely one of the deadliest places on earth right now, as swarms of new high-tech drones act as killing machines.
NBC News' Richard Engel talks to Ukrainian soldiers fighting to survive in this new era of warfare.
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