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active 9 years, 10 months ago
In movies, covert operatives typically only use high-tech gadgets on the job. In real life, this isn’t always the case. In World War I, for example, military personnel in the trenches used simple periscopes for observation purposes. You can make such a periscope without spending a lot of money. Do this activity and you’ll have a spy tool that you can use for secret missions!
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