"A Drill to Replace Crucial Transformers (Not the Hollywood Kind)"
The nation's entire electrical grid depends on about 2,100 high-voltage transformers spread throughout the country. Recently, engineers and homeland security officials held a drill to practice replacing one or more if some are knocked out.
"The electric grid, which keeps beer cold, houses warm, and city traffic from turning to chaos, depends on about 2,100 high-voltage transformers spread throughout the country.