the following Space Shuttle missions would dock at this location. On 11 February 2008, ESA's Columbus laboratory was attached to the starboard hatch of the Harmony module during space shuttle mission STS-122. On 14 March 2008, the Experiment Logistics Module Pressurized Section (ELM-PS) of Kibō was attached to its interim location: the zenith hatch of Harmony. During STS-124, a Space Shuttle mission flown by Space Shuttle Discovery, the Pressurized Module of Kibō was added to the port side of Harmony and the ELM-PS was moved, leaving the zenith hatch empty. The zenith hatch was originally intended to be the permanent docking connector for the now canceled Centrifuge Accommodations Module (CAM). When the Space Shuttle flew the Multi-Purpose Logistics Modules (MPLMs) to the station, the MPLM would be temporarily berthed to the nadir mechanism of Harmony. The Japanese H-II Transfer Vehicle and the American Commercial Resupply Service (COTS) vehicles, Dragon and Cygnus, are temporarily berthed to either the nadir or zenith mechanism. In August 2016, the forward docking port was equipped with the International Docking Adapter (IDA) delivered with the CRS-9 mission. This adapter was used for the first time for the automatic docking of the Crew Dragon spacecraft during its uncrewed test mission on 3 March 2019. On 26 March 2017, PMA-3 was robotically removed from the Tranquility module and attached to the zenith port of the Harmony module after being prepared during a successful spacewalk on 24 March 2017. A second spacewalk was conducted on 30 March 2017 to finalize the PMA-3 cable connections on Harmony. PMA-3 is linked to the International Docking Adapter-3 adapter, delivered on the SpaceX CRS-18 mission in July 2019. IDA-3 was fully linked to PMA-3 during an EVA on 21 August 2019. References External links Node 2 specifications from the ESA STS-120 mission page NASA - Harmony Node 2 Thales Alenia Space page for Node 2 Components of the International Space Station Spacecraft launched in 2007