It was flown by Space Shuttle Endeavour, and took the first American module, the Unity node, to the station.

A Propulsion Module would have been attached to the Unity node of the ISS.

The first component of the USOS pressurized segment is the Unity node.

The Unity node was delivered to the station by STS-88 on December 6, 1998.

Leonardo is attached to the Earth-facing side of the Unity node.

PMA-1 and PMA-2 were delivered with the Unity node on STS-88 in December 1998.

Wilson, Tani, and Anderson controlled the station's robotic arm, moving Harmony out of the bay and onto the port side of the Unity node.

Note that the Unity node joins directly to the Destiny laboratory.

The station's Unity node, already orbiting 250 miles above the earth, contains a surprising patch of salmon pink around the hatch to point the way to the emergency escape vehicle.

Inside the station's Unity node, crew members also completed the two-day task of outfitting the node.