Meanings of nuclear triad in English

U.S. officials have noted that America's nuclear modernization is lagging behind Russia's upgrade of its own nuclear triad.

U.S. officials have also noted that America's nuclear modernization is lagging behind Russia's upgrade of its own nuclear triad.

It means leaving the nuclear triad -the bombers, subs and missiles that can end all life on earth -alone.

Fully modernizing the U.S. nuclear triad will cost more than a trillion dollars over 30 years, according here to the Congressional Budget Office.

Should the country spend an estimated $1 trillion over 30 years to modernize the bombers, land-based missiles, submarine-launched missiles, and warheads of the nuclear triad?