Historically, the idea of peace has been represented by symbols that attempt to transcend differences of culture, such as the white dove, the olive branch, and the broken rifle. The now-familiar line-drawing of a crow’s foot in a circle was created specifically for the Campaign for Nuclear Disarmament by British artist Gerald Holtom, but it quickly caught on as a general, international sign for peace. Holtom has stated that it is derived from the semaphore flag signals for what two letters? Discuss
Source: The Free Dictionary