We did not have 150 DC-9s pre-merger. At one time, NWA DID have 150+ DC-9s, but at the time of the merger, we were down to around 1/3rd or fewer of that number, if memory serves. Most of the -30s were gone, all of the -10 were gone, but again, just my memory of it. BTW, the 717 is built, I'm pretty sure, on the DC-9-40 airframe.