Wikipedia is currently fighting a war on vandalism. Wikipedia is vandalized many thousands of times per day, with most of these occurrences corrected within minutes or even seconds. This requires many volunteers in an organized effort to repair this damage. The Wikipedians on the front lines of this battle are the members of Wikipedia's intrepid Counter-Vandalism Unit (CVU). The CVU has developed specialized tools, procedures, and initiatives for fighting vandalism on Wikipedia. You can be of great service to Wikipedia by joining the CVU.