garymortimer writes: "In January 2012 we were sent the images that exposed the level of pollution occurring. They were taken by an sUAS News reader that still wishes to remain anonymous. The story went viral and continues to receive hits nearly a year later. I believe this is the first environmental crime to be prosecuted on the basis of UA evidence. Authorities had to act because of the attention the story was receiving."
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals