When a new illness in cattle appeared in the United Kingdom twenty years ago, its ensuing nationwide and global repercussions could not have been envisioned. Not only did mad cow disease destroy the British cattle industry, it raised the fears of leaders and citizens around the world. Wary of tainted British beef, the European Union stepped in to attempt to curb the crisis while it was in its infancy. Soon the United States, in an effort to protect its own citizens and cattle industry, enacted measures banning European cattle products. The effects of the peculiar cattle disease reverberated through the global economy, heightening trade disputes between the United States and the European Union that have yet to achieve resolution.