Five months after a frightening launch abort, cosmonaut Alexey Ovchinin and NASA flight engineer Tyler “Nick” Hague, along with first time flier Christina Koch, are set for liftoff Thursday on a six-hour flight to the International Space Station, boosting the lab’s crew back to six.

NASA has submitted a draft agreement for government approval that would allow Russian cosmonauts to begin flying to the International Space Station on U.S. crew capsules next year in a no-funds exchanged arrangement with Russia’s space agency. In return, Russia will continue launching U.S. and international astronauts on Soyuz missions.

Russian ground crews working in starkly different environments on the barren steppes of Kazakhstan and in the lush jungles of South America are readying a pair of Soyuz rockets for two launches Thursday, one to resupply the International Space Station, and another to broaden the capacity of SES’s O3b Internet network.