US firm designs airship to rain on forest fires
A California company is working on a giant airship that would help battle major forest fires by effectively creating an artificial rainstorm. The 300-metre (1000-ft) propeller-powered airship would
A California company is working on a giant airship that would help battle major forest fires by effectively creating an artificial rainstorm. The 300-metre (1000-ft) propeller-powered airship would