The Pentagon is ordering the top brass to incorporate climate change into virtually everything they do, from testing weapons to training troops to war planning to joint exercises with allies....

The directive, “Climate Change Adaptation and Resilience,” is in line with President Obama’s view that global warming is the country’s foremost national security threat, or close to it....

Climate change must be integrated in:

• Weapons buying and testing “across the life cycle of weapons systems, platforms and equipment.”

• Training ranges and capabilities.

• Defense intelligence surveillance and reconnaissance.

• Defense education and training.

• Combatant commander joint training with allies to “assess the risks to U.S. security interests posed by climate change.”

• Joint Chiefs of Staff collaboration “with allies and partners to optimize joint exercises and war games including factors contributing to geopolitical and socioeconomic instability.”