I remember from a couple years back. A Falcon 9 rocket had just launched from Florida with the first of the CRS missions. In the video, it appeared that about 120 seconds after liftoff, an engine exploded....and the the thing kept on going. No thrust interruption, no deviation in trajectory. It successfully made it to orbit. The Dragon capsule docked at the ISS and delivered its cargo, then returned to Earth.
If I had a choice between using the Antares verses the Falcon 9...it'd be the Falcon, every time.
Here's a VIDEO of that explosion.
At some point in the future, Falcon 9 will experience a catastrophic failure during launch -- law of averages. It will happen; the only question is when.