STS-97

Endeavour delivered the P6 truss and the first large US solar arrays to the International Space Station, the heaviest element a shuttle had yet brought up and a major jump in the outpost's power supply. It was the first shuttle to visit while a crew was aboard, docking with the Expedition 1 residents, and the last human spaceflight of the 20th century. A spacewalk freed a kink that had stopped one array from fully extending.