USA FINDS NO SIGN OF EXPLOSION ON MS804

But they also say they have images of the launch of the alleged missile that brought down MH17 but have not released those images to kill all the speculation...

BREAKING: U.S. sees no sign of explosion aboard EgyptAir flight in review of imagery: officials

— Reuters Top News (@Reuters) 19 May 2016

This does not rule out terrorism. There mnay have been an incident in the cockpit involving a passenger or passengers.

But there is also the possibility that the plane was taken over by remote control...and in which case who could and would do such a thing?

What electronic warfare exercises is NATO running at the moment?