Keith’s note: Former NASA Center Director Mark Geyer has died. NASA PAO will have a statement soon. Ad Astra, Mark. NASA Administrator Pays Tribute to Senior Advisor Mark Geyer, NASA “Today, we mourn the loss of a giant for human spaceflight and a beloved member of the NASA family: former Johnson Space Center Director Mark Geyer. I offer my deepest condolences to Mark’s wife, Jackie, his three children, and the […]