hydrogen, and those things have to go in there at negative 400 degrees fahrenheit in the case of hydrogen. it is very hard to hold and at that pressure. it is very hard to hold it at that temperature. all this means is the complexity of this seems to have gotten away from nasa today alex. better safe than sorry. that is the understatement of the year given what s at stake financially, and the whole program, the sentiments about it. quickly those that are working for nasa, how much you think this is a bit of a deflating measure today? where is this built in? they get, at this kind of think it s gonna happen. i have no doubt that there is a fundamental expectation built into the training and that s our personnel that there is an extraordinary amount of complexity. the checklists are endless. and you never know where this thing is gonna go. but there s also a lot riding on this. this is the largest rocket ever built. it is a cornerstone of nationalist ambitions. now that agency is han