A former military invention to detect gunshots and send photos of the shooter in seconds has been installed on Fremont Street in downtown Las Vegas.
from https://www.reviewjournal.com/local/local-las-vegas/downtown/gunshot-detection-equipment-installed-on-fremont-street-canopy-2160183/
from
https://calliduselctric.tumblr.com/post/632820852095959040
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