In June 1977 an obscure reference to "ERW" in the classified budget of the U.S. Energy Research & Development Administration happened to arouse the curiosity of Congressional & media investigators. "ERW", it turned out, referred to "enhanced radiation warhead", which upon further probing referred to a new type of nuclear warhead that emitted bursts of neutrons, not explosives. Such a "Neutron Bomb" could kill everything living in its vicinity while...