There's a hidden wire stretched above American cities — and few people know what it's for
Unbeknown to most, there are transparent wires that wrap around over 200 cities in North America — including Manhattan — to mark a religious boundary.
And every week, there is a "secret operation" to check and repair the wire in time for the weekend. We tagged along to see what it's all about.
Produced by Jenner Deal
Follow BI Video: On Twitter