Looks like a Project Warp Speed success. Too bad they couldnt release this a week or two ago but it is what it is and this can go in the Trump presidency win column.
Im not sure if Pfizer is one of those Trump paid to start manufacturing during trials so there would be some significant stock pile to begin release to high risk groups and first responders.
They did not participate in project warp speed:
Dr Kathrin Jansen, Pfizers head of vaccine development, told the New York Times: We were never part of the Warp Speed ... We have never taken any money from the U.S. government, or from anyone.