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Launch, that i think she is hoping will still happen. again, we're still waiting to see if it will take place. mars, professor, how realistic at this point? >> well, we're going on stage one, stage two, so on and so forth. artemis i is the launch we're seeing today. artemis ii is when we go around the moon with live astronauts. artemis iii is when we actually land on the moon with a person of color and a woman. and artemis iv is the permanent presence on another celestial body. all of which will go towards going to mars some time after 2030. we have to look at the pot of gold at the end of the...

The launchpad. for now, launch is scrubbed. >> launch is scrubbed. kristin fisher, thank you so much. launch is scrubbed. it's so interesting to hear kristin ticking through the different problems they had but it really came down to the engine situation. michelle, tell us about the engines stuck to this rocket and why this can be troubling. >> they're really fascinating engines. these engines have been in space before. these are engines flown on the space shuttle. this type of engine has lots and lots of experience. i trust their judgment that something wasn't quite right today. these engines ...

Artemis rocket, the sls rocket and the orion crew capsule on top, has ever flown. we knew there was a very good chance that they were going to run into issues today. knew there was a very good chance that it may not launch today. and it looks very likely that we will not see a launch today. i'm going to explain why. it is not officially been scrubbed yet, by any means, but it's not looking good. here's why. we have seen four big issues that nasa has been trouble shooting. three of them have been solved. first, there were lightning issues. then there was that hydrogen leak during fueling. they ...

Of the overall rocket, but it was on engine 3, some kind of a bleed on engine 3. >> yeah. liquid hydrogen flows into the engine, it gets lit and that's what makes you get off the launchpad very quickly. but that engine needs to be precooled before you do all of that. the plumbing that allows that to happen is not working. they've been trying to force open essentially a door to make that happen. they haven't been able to do it. >> professor, human endeavor is not without setbacks. this, so far, is a relatively mild one. >> right. i think it's actually good news. it's good news that they caught ...