In a battle against nature that sounds straight out of the Old Testament, residents of West Africa are trying to fight off the most serious outbreak of locusts in 15 years, with swarms moving rapidly across Mauritania, and into countries like Senegal and Gambia.  According to the Environmental News Network, these desert swarms contain up to 80 million locusts per square kilometer which can devour an entire crop field in minutes, and travel more than 80 miles per day.  Mauritania, which is twice the size of France, has just one operational airplane in its army, and needs up to $20 million, 15 planes, and over 150,000 gallons of pesticides to contain this devastating plague.