And, well, they were slow and easily shot down, by air or by ground forces.

Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has ...

(CNN) — At the end of July, Colorado became the latest US state to battle the spread of wildfires. Four blazes broke out, and while most are now contained, sustained hot, dry conditions this summer ...