Donald Trump's wall: How tech guards the US-Mexico border
Camera-laden towers and underground sensors plug the gaps in the existing US-Mexico border fence.
from BBC News - World https://bbc.in/2SC1TGG
from BBC News - World https://bbc.in/2SC1TGG
Donald Trump's wall: How tech guards the US-Mexico border
![Donald Trump's wall: How tech guards the US-Mexico border]()
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February 09, 2019
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