“In a situation like this, we can’t supply the United States with our world’s best rocket engines.. Let them fly on something else, their broomsticks, I don’t know what.”
Source: Roscosmos Boss, Rogozin, in a media interview, shooting his mouth off once again... following Russia having halted its rocket supply to the US, and, despite many believing that production stateside is both plentiful and capable enough to mitigate the problem, a suitable replacement for the RD-181 engines supplied by the country is not yet ready for launch.