A week after he was arrested in Chicago on Oct. 3, David Coleman Headley was charged in a federal criminal complaint with conspiring to commit terrorist attacks outside the United States and providing material support to terrorist organizations. The charges alleged that Headley was involved in a plot to attack a newspaper in Denmark that had published a collection of cartoons satirizing the Prophet Mohammed in September 2005. Since Headley's arrest, there have been almost daily disclosures of new information regarding his activities and those of his co-conspirators. These new details have emerged during court proceedings and from leaks by U.S., Indian and Pakistani government officials. On Dec. 7, new federal charges were filed against Headley alleging that he had conducted extensive surveillance against targets in Mumbai that were attacked during the November 2008 armed assault in that city, which resulted in the deaths of some 170 people.