What Was David Headley's Role in the Mumbai Terrorist Attacks?

The case against David Headley, 49, the American accused of helping plan the November 2008 terrorist strikes in Mumbai, fills in several of the missing links about how the attacks were planned and executed with such precision. Because two Indian men on trial in Mumbai for providing intelligence were arrested months before the attacks took place - before the Mumbai strategy was even finalized - security analysts here have long assumed that the plotters must have had other sources of information. The complaint against Headley claims that he was that source. If true, it opens a window into how the global jihadi network operates.