It is the most widely produced chemical in the world and possibly the most dangerous. Take a look at the many uses of acid. See how the military harnesses acid to make the explosive "Comp B-4." Visit a sulfuric acid plant to see how acid can take the stain out of stainless steel and learn how it can be mixed to dissolve precious metal. At the Heinz vinegar plant discover why acid's sour taste is sweet. Finally, learn how acid loving bacteria in Yellowstone National Park may hold the key to a biological industrial revolution and meet a mad scientist who will demonstrate how acid can hollow out a penny and turn a hot dog to sludge!