Vander Velde standing on top of IMB pool

IMB (Irvine, Michigan, Brookline), a collaboration between the University of Michigan, the University of California at Irvine, and the U.S. Department of Energy, was an experiment designed to determine the ultimate stability of matter. Jack Vander Velde in Morton Salt mine (site of IMB experiment). Standing on top of liner, supported by water beneath. In the background are portholes for inserting equipment into the water.