PARIS — Russia’s Proton M/Briz M heavy-lift launch vehicle successfully returned to flight Sept. 28, sending a Russian government satellite to geosynchronous orbit from the Baikonur Cosmodrome in Kazakhstan. The Proton has been grounded since May, when an anomaly on the rocket’s third stage led to the loss of Russian Satellite Communications Co.’s (RSCC’s) AM4R satellite. The failure’s cause has yet to be made public, though the Russian federal government ...

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