The jet was taken a long distance from the terminal and "completely engulfed" by emergency vehicles and heavily armed police once it landed, said Don Graham, who was waiting for relatives to arrive at the airport.

CNN: New Detroit scare declared 'nonserious'

The intended market is city pairs (like Seattle-Paris) big enough to support nonstop service with a smallish jet but not big enough to fill a giant long-distance plane like the Boeing 747 or upcoming Airbus A380.

FORBES: 7 Digital 7