Nerve Center

Grand Central Terminal moves 130,000 passengers a day over 400 miles of track and through 110 stations spread across New York City and upstate New York.

Since its inaugural performance, Cirque Du Soleil's "O" has enthralled over 10 million spectators, during the course of 6000 shows.

The Panama Canal is one of the largest canals in the world and shaves 8,000 miles off what would otherwise be a two-week voyage for the 14,000 vessels that pass through it annually; the most risky manouevre is when northbound ships meet southbound.

Hartsfield-Jackson Atlanta International Airport manages 2,700 take-offs and landings and 250,000 passengers daily; it is most strained to capacity on Friday night at 19:24, when there .. show full overview

With over 150,000 calls each year, the District of Columbia Fire and EMS is one of the busiest all-hazardous agencies in the U.S.

The Port of Los Angeles is the biggest, busiest and most significant gateway in North America.