It is being reported by numerous news organisations that Neil Armstrong has died. I know that the many American readers on this forum will feel an especial loss, but so will the rest of the world. Whatever you think about the virtues (or otherwise) of the Apollo programme, Armstrong stood for a defining moment in world history, arguably the single most important moment in the 20th century. He could have been forgiven if after his experience he became a rampant egoist, but the man remained modest and unassuming for the rest of his days. I am reminded of (of all things) some lines from an Elton John song - 'If one in ten could be that brave, I would never hate again'. RIP.