> Gas, electric heat, water and sewage were were maintained to the building all during the move. The 600 workers entered and left the traveling structure using

> Gas, electric heat, water and sewage were were maintained to the building all during the move. The 600 workers entered and left the traveling structure using a sheltered passageway that moved with the building. Sounds like a risky undertaking in case anything goes wrong: people in the building + a live gas line.