Mr Wiseman said the only thing that went through his mind was "I hope they get down safe".
"We don't have an opportunity to extend it for a long time", Krikalyov said.
NASA astronaut Nick Hague and Russian cosmonaut Alexey Ovchinin launched from the Baikonur cosmodrome in Kazakhstan at 9:40am BST this morning. The space station has enough food and supplies for the current crew to last six months, the Interfax news service reported, citing an unidentified person. The Soyuz MS-09 capsule which delivered them remains docked to the station and can be used to return that crew home at least through the end of the year. In a statement, NASA Administrator Jim Bridenstine confirmed he had been informed the two crewmembers were safe. Write to us in the Comments section, and visit our Facebook page.
Cosmonaut Aleksey Ovchinin and NASA astronaut Nick Hague were forced to conduct an emergency landing on Thursday after their rocket suffered a malfunction shortly after take-off.
A couple minutes after liftoff, however, a frantic message - "Failure, failure, failure", blared across the live feed.
The rocket's emergency abort system took over at that point, ejecting the Soyuz capsule, which carried the two-man crew on a harrowing ride back down to Earth. Search and rescue teams were immediately scrambled to recover the crew, and paratroopers were dropped from a plane to reach the site quickly.
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At the time, China and Mexico were rhapsodising about their close and rosy relationship. Pence also denounced Beijing's crackdown on minority Muslims in the Xinjiang region.
While Russian rockets had earned a stellar reputation for their reliability in the past, a string of failed launches in recent years has called into doubt Russia's ability to maintain the same high standards of their manufacturing.
"It is a known mode of descent that crew members have gone through before", the Dean said.
By early Thursday afternoon, Ovchinin and Hague were on helicopters, making their way back to Baikonur, NASA said. "We plan that they will fly in the spring".
It is also possible that this event could affect the next scheduled crew launch of three astronauts in December who were set to replace NASA astronaut Serena Auñón-Chancellor, Russian cosmonaut Sergey Prokopyev and Gerst. That trio arrived in June.
Footage from inside the Soyuz showed the two men being shaken around at the moment the failure occurred, with their arms and legs flailing.
He added: "Spaceflight is hard!"