recent comment left on the WTHR facebook page:

"What's up with sum websites saying that the explosion was due to a drone carrying missles by the C.I.A tht was targeting Indianapolis,In"

[link to www.facebook.com (secure)]

sounds like other people are thinking the same thing....if that is the case, there's no way all of those first responders will be able to keep their mouth shuts. someone will tell someone what they saw....