Mission to rescue astronauts reaches space.

(Reuters) NASA and SpaceX launched a long-awaited crew to the International Space Station (ISS) on Friday, paving the way for the return of American astronauts Butch Wilmore and Suni Williams, who have been stranded on the orbital laboratory for nine months.

SpaceX's Falcon 9 rocket lifted off at 19:03 PM (Brasilia time) from the Kennedy Space Center in Florida, carrying four astronauts who will replace Wilmore and Williams. Both are NASA veterans and former US Navy test pilots. They were the first to fly in Boeing's Starliner capsule in June, which experienced malfunctions.

Although it is a routine crew rotation, the Crew-10 mission represents a crucial step in bringing the two astronauts back to Earth, within a plan drawn up by NASA last year and which has recently gained urgency due to pressure from former President Donald Trump.

The launch took place while Wilmore and Williams were sleeping during their daily schedule on the ISS, Dina Contella, deputy program manager for the station, said after the launch.

Crew-10 is scheduled to arrive at the ISS on Saturday at 11:30 p.m. (ET). Wilmore and Williams are scheduled to depart on Wednesday at 8:00 a.m. (GMT), along with NASA astronaut Nick Hague and Russian cosmonaut Aleksandr Gorbunov, who arrived at the station in September aboard a Crew Dragon capsule with two empty seats reserved for NASA veterans.

The new ISS crew, which will remain for approximately six months, includes NASA astronauts Anne McClain and Nichole Ayers, as well as Japanese astronaut Takuya Onishi and Russian cosmonaut Kirill Peskov.

Planning for the unexpected

Minutes after reaching orbit, Anne McClain unveiled the mission's "microgravity indicator"—a tradition in American spaceflight that symbolizes safe arrival in space. The chosen indicator was an origami crane, the international symbol of peace, hope, and healing.

"It's much easier to be an enemy than to be a friend, it's simpler to break partnerships than to build them," said McClain, commander of Crew-10, speaking live from the Crew Dragon capsule via NASA.

"Space exploration is difficult, and success depends on leaders who choose the right path, even if it is the most difficult one. We explore for the benefit of all," he stated.

The mission became embroiled in political disputes when Trump and his advisor Elon Musk – CEO of SpaceX – pushed to accelerate the launch of Crew-10, alleging, without evidence, that former President Joe Biden had abandoned Wilmore and Williams on the station for political reasons.

When questioned, Wilmore rejected the narrative of political interference. "We came prepared for a long stay, even though we had planned for something shorter," he told the space press this month. "That's the purpose of our country's manned space program: to plan for the unknown and deal with unexpected contingencies. And that's what we did."

Crew-10 is part of NASA's normal crew rotation on the ISS, and not a specific rescue mission for Wilmore and Williams. According to Musk, SpaceX offered a dedicated flight last year to bring the pair back, but NASA claimed it lacked the budget or operational need to send a capsule solely for that purpose.

While awaiting their return, the astronauts conducted scientific experiments and maintenance work with the other crew members on the station. Williams, who is eager to see her family and her two dogs again, admitted that the wait was harder for those who stayed home. "It was a rollercoaster for them, maybe even more so than for us," she commented.

Political pressure and "unusual" preparations

Trump and Musk's request to expedite Wilmore and Williams' return was an unusual intervention in NASA's processes. The agency ended up moving the Crew-10 mission forward from March 26 to March 14, swapping a SpaceX capsule that would have been delayed for one that was ready first.

The pressure influenced the mission's preparation schedule, which normally follows a strict safety and checklist protocol. "It was an atypical preparation flow in many respects," said Steve Stich, manager of NASA's Commercial Crew Program.

Ken Bowersox, the agency's chief of space operations, revealed that the mission faced last-minute challenges, such as a fuel leak on a recent Falcon 9 launch and the deterioration of the coating on some of the Crew Dragon capsule's thrusters.

"It's difficult for NASA to keep up with SpaceX's pace," Bowersox acknowledged. "We're not as agile as they are, but we're working well together."