Sourced : Defence Update
In his recent strategic review, U.S. President Donald J. Trump introduced his administration’s defense strategy.
The majority of the review addresses the evolving threats by terrorism, non-state organizations, and economic competition with major world powers, but part of that strategy also addressed the challenges posed by ballistic missiles and nuclear weapons, not only those developed and tested by North Korea and Iran, but the large Chinese and Russian nuclear arsenals being modernized, and enhanced with new capabilities that pose significant new challenges to American missile defenses.
Read more at : http://defense-update.com/20171231_russian_strategic_modernization.html