to arrive shortly, activated experiments and turned on environmental control to cool Nauka until the RTOd radiator was extracted from Rassvet in October. At 17:47 UTC, the hatches were opened and Novitsky and Dubrov entered Nauka and made their way into the workshop. They first installed ventilation lines from the U.S. and Russian segments to vent out any stale air remaining from the launch. Next, they activated alarms and smoke detectors and installed gas monitors to check for traces of UDMH and N2O4 following venting the day before. They finished the day by removing unneeded hardware and launch restraints and transferring them to Progress MS-17 for disposal. On 2 August 2021, Novitsky and Dubrov dismantled some hardware that came up in Nauka and disposed of unneeded trash. They also started installing racks and assembling the station's toilet, and assembled the environmental control systems. They finished the day by cleaning their spacesuits and doing maintenance on the suits' environmental systems in preparation for an upcoming spacewalk. Over the next few days, they unloaded all the cargo and emptied the corridor so the cosmonauts could gain access to the nadir end. On 9 and 12 September 2021, two spacewalks were performed by Novitsky and Dubrov to wire up Nauka. The cosmonauts also installed handrails and attachment points for experiments. Work was done inside to install the Robotic Work Station which controls ERA. On 28 September 2021, Soyuz MS-18 was moved around the block to Nauka for the first docking of these two spacecraft. This cleared Rassvet for the arrival of Soyuz MS-19 on 5 October 2021. On 15 October 2021, at 09:02 UTC, during preparation of the ship's propulsion system for landing, the Soyuz MS-18 inadvertently fired its thrusters beyond its planned time, changing the orientation of the ISS by as much as 57°, at 09:13 UTC. The station's attitude control system counteracted that motion by activating thrusters of the Russian Segment. The erroneous firing of Soyuz engines was the result of a procedural error in the instructions sent by mission control to Novitsky ahead of the test. Fortunately, the flight control system aboard the Soyuz spacecraft had a limit set for the engine testing, which generated a cutoff command as soon as the firing consumed all the propellant allocated for the test. As a result, all the propellant reserves aboard the spacecraft needed for landing remained untouched. The crew was not