claim: Pakistan is an old country.
evidence: Radioflash is a term used -LRB- chiefly in sources from the United Kingdom -RRB- in early literature on the phenomena now known more widely as nuclear electromagnetic pulse , or EMP .. United Kingdom. United Kingdom. nuclear electromagnetic pulse. nuclear electromagnetic pulse. nuclear. nuclear weapons. The term originated in the early 1950s , primarily associated with the `` click '' typically heard on radio receivers when a nuclear bomb was detonated .. nuclear. nuclear weapons. It was later discovered that the phenomena was one part of the more wide-ranging set of effects resulting from EMPs after the detonation of nuclear and certain chemical weapons .. nuclear. nuclear weapons. chemical weapons. chemical weapons. Instrumentation failures observed during nuclear weapons testing between 1951 and 1953 were mentioned in declassified military literature as attributed to `` radiated radioflash '' .. nuclear. nuclear weapons. nuclear weapons testing. nuclear weapons testing. declassified. declassified. A similar term was first used in the Soviet Union in an early theoretical publication -LRB- which contained some errors and was later corrected -RRB- on the effects of a nuclear explosion .. nuclear. nuclear weapons. Soviet Union. Soviet Union. The term has also been used in high-energy physics in the description of a type of collective ion acceleration that would take place during intense solar flares .. high-energy physics. high-energy physics. ion. ion. acceleration. acceleration. solar flares. solar flares