Answer:
They were primarily designed to kill humans
It dried up.
North Africa used to be a fertile grassland, even swampy in some spots, 12,000 years ago. By 1000 BC (actually quite a while before) it had dried up into what is the the largest desert i the world: the Sahara.
The war in the middle east raises immigration,the president bringing in refugees, and equality in the U.S.
