Photos: A vast zeppelin over the Valley

According to Airship Ventures, "when not in flight, the airship is moored to its 62,500-pound mast truck, a mobile vehicle equipped with a 20-ton hydraulic mast system, which raises the mast vertically to a height of 42 feet."

Here, the zeppelin's pilots maneuver it to dock with the mast.

Photo by Daniel Terdiman/CNET Networks

Caption by Daniel Terdiman