Aquela piada dos americanos gastando bilhoes para criar uma caneta que funcionasse no espaço enquanto os sovieticos usaram um lapis
Some schools in Florida, Georgia and Colorado will be equipped with drones this year that can go through halls, smash windows and pepper-spray active shooters if teachers report a threat. The program follows a wave of high-tech campus security spending. https://wapo.st/4gVNMXn