From responding to weather disasters to rising competition in the fast-warming Arctic, militaries are exposed to climate change and cannot let it become a strategic "blind spot," security experts say.

At the same time, President Donald Trump has upended America’s digital defenses by firing the four-star general who led the National Security Agency, shrinking cybersecurity agencies and slashing ...

China's fighter fleet, bombers, and missiles give it "high marks" to deny US air superiority in the area, Adm. Paparo said.