On Dec. 6, 1998, the six-member STS-88 crew mated Unity, the first U.S. element of the International Space Station, with the already-orbiting Zarya module, beginning the historic assembly of the ...

STS-98 brought up the Destiny Module and attached it to the forward side of Unity. STS-100 brought up the Canadarm2 - which was crucial for constructing the station.

The spacecraft will be installed to the orbiting lab's Earth-facing port of the Unity module. More than 3,500 kilograms of cargo were shipped to the ISS, including an upgraded 3D printer to ...