An Antares spacecraft operated by Orbital Sciences and contracted to NASA to carry supplies to the International Space Station exploded on liftoff in Virginia. A failure for the American space program? Yes. But the major failure may be due to the fact that this craft, like most others operated by US companies, relies on Russian engines. Soviet engines, actually. I mean literally built in Soviet times. They have been refurbed, but Orbital Sciences was supposedly concerned about quality:
The NK-33 engine that powered Antares’ first flight was built decades ago by Russia’s Kuznetsov Design Bureau and is no longer in production. Further, Orbital is uncertain about the quality of Aerojet‘s remaining stockpile of 23 NK-33s, beyond those set aside for NASA’s CRS-1. Aerojet Rocketdyne is Orbital’s primary subcontractor and overhauls the old NK-33 engines into a configuration for Antares, dubbed AJ-26.
The fraught relationship with Russia, and Russian threats (uttered by Rogozin the Ridiculous, true) to cut off supplies of engines to the US has spurred efforts here to develop an American engine. Maybe NASA and the Pentagon should expedite those efforts.