
How do we protect the most valuable, the most important, and the most dangerous things on Earth? The answers might be surprising! Sometimes guards stand watch 24 hours a day. Other times thick concrete vault walls help keep priceless items safe. From storage caves deep underground to high in the sky aboard the U.S. president's plane, give readers a glimpse inside some of the world's most secure places.
Page Count:
32
Publication Date:
2020-01-01
ISBN-10:
1543590640
ISBN-13:
9781543590647
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