Re: Blown up not blew up
That's simply not true. The Range Safety Officer is there to ensure that the vehicle does not deviate from the approved track far enough to risk damage to people or property. In particular, if the vehicle becomes uncontrollable, the RSO will terminate the flight so that it will falls within the range's designated volume (airspace and floorplan).
Following a catastrophic event, the RSO may well try to terminate the flight, but the emphasis here is on the word _following_. The reason terminating a flight that is already exploding is that no-one wants (e.g.) the second stage to ignite and go barreling off to see what it can see [Yeah, I know, massively unlikely, but not impossible].
So this isn't semantics: from the looks of things, Antares blew up. The RSO may have aborted the flight, too, but if you watch the video closely, that would have been while the vehicle was moving backwards...