The Peace Symbol
The first famous person to use the peace symbol was pacifist Bertrand Russell.  His group used it during a protest march in 1958 for nuclear disarmament in Aldermaston, England.  Activist Gerald Holtom, who designed the symbol, based it on the international semaphore alphabet.  This system uses flag signals in place of letters like a code.  The peace sign is actually the flag signals for 'N' and 'D' superimposed upon each other and it stands for Nuclear Disarmament.  It has since become the international symbol for peace.