The problem with nuclear test explosions is that they create radioactive fallout. (businessinsider.com)
The CTBT would prohibit the U.S. and every other signatory from conducting test explosions, no matter how small, of nuclear weapons underground, in space or anywhere else. (scientificamerican.com)
After that test, some analysts said the country was likely to need only a couple more test explosions before acquiring a miniaturised warhead that could be mounted on a long - range missile. (newscientist.com)