Mr. Lightfoot mentions an ISS resupply mission as an option for one Orion mission. That would be a crazy use of SLS/Orion. Please no! That's just silly use of SLS and Orion.
That's a great photo of the weld in progress! I don't think we get to see much of the actual flight hardware, but a bit of it is visible down inside the weld tool fixture (see attached). Am I correct in thinking the weld is being performed upside down, i.e with the aft bulkhead above the barrel section? And then, is that bit that looks different along the seam (closer to the camera than the weld apparatus) a section of the seam which has already been welded?