The Five challenges of Carter

According to US defence secretary Ash Carter:

  1. The return of great power competition with :
    • Russian aggression in Europe and
    • China’s rise threatening the stability of the Asia-Pacific region
  2. North Korea as a nuclear-armed rogue state.
  3. The continuing malign intentions of Iran despite the nuclear deal.
  4. The “tumour” of jihadist terrorism, above all in the form of ISIS, “metastasizing” around the world

source : The Economist