WASHINGTON — Russia sent two cosmonauts and a United States astronaut to the International Space Station, or ISS, on Tuesday from Kazakhstan, resuming crewed flights from a recently repaired launchpad with a rare joint attendance by the heads of NASA and Russia's space agency.

Liftoff is scheduled for 10:47 a.m. ET.

NASA Administrator Jared Isaacman is visiting Russia's space launchpad for a scheduled launch of a U.S.-Russian crew to the International Space Station.