It's an interesting hat, worn by American physicist Robert J. Oppenheimer. "Oppie" is the man who directed the Manhattan Project and developed the first atomic bomb. This is the hat that Oppenheimer wore at the Trinity nuclear test, on July 16, 1945, in the New Mexico desert. The hat was left behind and recovered by Roy J. Glauber, American physicist, who kept it for many years before passing it on to his doctoral student, Daniel Frank Wells, who took the hat to Australia. Fortunately, after Wells passed away I was able to bring the hat back to America, where I wear it today. It is still very slightly radioactive.
