The madness of Donald Trump incorrectly labeled two astronauts "the world's first space walkers."
The 73-year-old US President congratulated Jessica Meir and Christina Koch for making the world's first space shuttle outside the International Space Station (ISS).
But he was red-faced after Mrs. Meir made it clear that this was strangely inaccurate.
The first female space shuttle actually took place in 1984 and 14 more followed.
The latest feat, part of NASA's 61 expedition flight, is the first to occur outside the ISS.
Mr Trump was sitting at a table in the White House with his daughter, Ivanka Trump, and Vice President Mike Pence was sitting on either side of him.
NASA officials and a group of Girl Scouts joined in the significant call.
Staring at the camera, the world leader said, "This is the first time for a woman outside the space station. "
" You are amazing people; they run the first ever female space path to replace the outer space station.
"They do some work and do it at a very high altitude – an altitude that very few people ever see. "
But then Mrs. Meir may be heard correcting the president.
She said: "We do not want to take too much credit, because so far there have been many other cosmodromes for women.
"This is the first time there are two women outside. "
Astronauts worked to replace a faulty power controller known as a power unit charge the battery (BCDU).
But in 1984 Svetlana Savitskaya became the first woman to take a space walk.
In the 35 years since the total of 15 women have taken place, they have walked.