In court testimony Saturday, a government witness testifying against Manning said that the now infamous federal informant Adrian Lamo subsequently contacted authorities in July 2010 to say that he’d learned through online chats that a person named Jason Katz who worked at a Department of Energy lab had tried to help WikiLeaks decrypt a video of the 2009 Garani Incident, in which U.S. warplanes allegedly killed nearly 100 Afghan civilians.

http://www.wired.com/threatlevel/2011/12/lamo-katz/all/1