Here's what happens when you ask top government officials about an ultra-secret cyber weapon
The world's first cyber weapon — a software worm that infected and destroyed Iranian nuclear centrifuges — was a joint operation between the US and Israel.
But don't expect any of the top government officials or others who were involved in its creation to tell you that.
In this exclusive clip from the forthcoming documentary "Zero Days" by Alex Gibney, you can see how hard it is to get information on the virus which researchers later named Stuxnet.
The film, which comes out on July 8, tells the true story of how two governments worked together to do with software what previously could only be achieved with bombs, though its use has ushered in a new, disturbing era of cyberwarfare.
Featured in the clip:
Maj. Gen. Amos Yadlin, Commander of Israeli Defense Intelligence, 2006-2010
Gary Samore, US Weapons of Mass Destruction "Czar", 2009-2013
Rolf Mowatt-Larssen, CIA Officer 1982-2005
Chris Inglis, NSA Deputy Director, 2006-2014
Yuval Steinitz, Israeli Minister of Intelligence, 2013-2015
Col. Gary D. Brown, Staff Judge Advocate, U.S. Cyber Command, 2009-2012
Ralph Langner, control systems security consultant
Eugene Kaspersky, Founder of Kaspersky Lab
Anonymous soldier with Israel Defense Forces
Gen. Michael Hayden, Director of NSA, 1999-2005 and Director of CIA, 2006-2009