Question: In what year did Commodore Byron McCandless's grandson make the first ever untethered free flight in space?
Sentence (from "Byron McCandless"): Commodore Byron McCandless (September 5, 1881 – May 30, 1967) was a longtime U.S. Navy officer who was awarded the Navy Cross during World War I and the Legion of Merit during World War II.
Relevant evidence: No