Well before 1945 the most sought-after steel in physics was produced, much of it from old warships and shipwrecks. Not as strong or lasting as modern steel. What makes it valuable is something it never had. The first nuclear tests changed the atmosphere. Artificial radionuclides were released into the atmosphere and spread around the world; steel produced subsequently can contain low concentrations of these nuclides. For ordinary purposes, the difference is meaningless. Illus

The Indian armed forces are the largest volunteer military forces in the world. They are composed of over 1.4 million active serving...