People in the tall building quickly responded to the aircraft, drew a large sign and held it in a building window. Their sign said, "YOU ARE IN A HELICOPTER.' The pilot smiled, waved, looked at his map and determine the course to steer to SEATAC (Seattle/Tacoma) airport and landed safely.
After they were on the ground, the co-pilot asked the pilot how the "YOU ARE IN A HELICOPTER" sign helped determine their position. The pilot responded, "I knew that had to be the MICROSOFT building because they gave me a technically correct but completely useless answer."
