The world's most powerful backhoe dredger digs up New York Harbor to clear the way for bigger cargo ships, a revolutionary new firetruck protects an international airport, and a mobile factory rushes against the clock to rebuild a railroad.

The premier heavy-lift ship transports one of the largest cargoes ever moved in one piece, custom-built transporters fight earth's driest desert to deliver a 100-ton telescope, and an army of walking diggers repairs massive damage before winter's snow.