Yesterday, about 5000' feet under the ocean when they removed the Riser Tube lower flange. They were sticking up out of the BOP upper flange.
They had a special 'tool' they lowered over the top and cut out the two pipes. Then, they lowered the new TRANSITION SPOOL onto the BOP upper flange (late yesterday evening) and finally tightened the bolts ( early, early this morning, before light)
CAP ON !!!!