Which Space Shuttle mission launched Canadarm2 to the ISS?

Space Shuttle mission STS-100 launched Canadarm2 to the International Space Station. The mission used Space Shuttle Endeavour and began on April 19, 2001.

STS-100 was an ISS assembly and logistics flight whose highest-priority tasks were delivering, installing and checking out the new Canadian robotic arm. Astronauts Chris Hadfield and Scott Parazynski attached Canadarm2 during the mission’s first spacewalk on April 22.

The installation was not completely routine: the astronauts had difficulty applying the correct torque to one of the arm’s attachment bolts. They switched the spacewalk tool to manual mode and completed the connection. Canadarm2 became operational on April 28, near the end of the mission.

STS-100 is often confused with other ISS construction missions, including STS-88 and STS-104. Those flights delivered different station hardware. STS-100’s defining payload was Canadarm2, which became essential for assembling and maintaining the growing orbital laboratory.