Germaphobe

Over human planet in space, not far from the stratosphere formed crimson cloud, which stands out not known to science biological life forms. As a consequence, many experiments and analyzes, it was found that these creatures are harmful to not only the planet, but also to humanity. It was impossible to lose a minute. Scientists, along with the military, sent drones to kill these pests. You have to save all life on earth by controlling this plane. These creatures, rather sharply negative reaction on opening fire on them.