WorldCom began as a small long distance telephone provider and grew through acquisitions to become a large telecommunications company. However, in 2000-2002 fraudulent accounting practices were uncovered that inflated reported profits by $3.8 billion through improperly capitalizing regular operating costs. This led to WorldCom filing for the largest bankruptcy in US history at the time in 2002. Key executives were later charged and convicted for their role in the fraud scheme.