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In this April 24, 2018 photo, a man walks to the entrance of a building monitored by a virtual security guard in Buenos Aires, Argentina. Hundreds of owners and tenants of middle class buildings in Buenos Aires have hired a new virtual security service called Ojo del Halcon, better know as Totem. This new technology, marketed by traditional security companies, breaks with an established tradition as it replaces the humans who physically guard the buildings with machines, which are monitored by security guards from a headquarters located on the outskirts of the city. (AP Photo/Rodrigo Abd)

Technology

Technology

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