Martin Hellman sends in a pointer to his essay that uses analogies from cryptography and the sport of soaring in an attempt to draw people in to thinking about the risks of nuclear weapons. Quoting: "... I did a preliminary risk analysis which indicates that relying on nuclear weapons for our security is thousands of times more dangerous than having a nuclear power plant built next to your home." Hellman is best known as co-inventor (with Diffie and Merkle) of public key cryptography, and has worked for over twenty-five years to reduce the threat posed by nuclear weapons. He is also a glider pilot with over 2,600 logged hours. Hellman adds, "Readers needing a break can go to some photos of the Sierra Nevada mountains taken from my glider."