Did Antares rocket explode because it was using 40-year-old Russian engines? NASA launches investigation after $200m of equipment was destroyed

The Antares rocket was set to blast off at 6.22pm - but exploded six seconds after leaving the launchpad in Wallops, Virginia. 'A mishap has occurred. We have lost the vehicle,' controllers said. Officials said there were no casualties from the explosion -and the damage was contained to the launch facility.

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