Grab that image before it vanishes folks...what in goodness sake is going on ? a test ? a test of what ?
Any ex-nasa folk here ?

No, it's not a flying saucer, it is the domed top to a 70 foot long vacuum tank at the Lewis Research Center's Electric Propulsion Laboratory, Cleveland, Ohio. The three technicians shown here in protective clothing had just emerged from within the tank where they had been cleaning in the toxic mercury atmosphere, left after ion engine testing in the tank. Lewis has since been renamed the John H. Glenn Research Center. grin.hq.nasa.gov...
