PARIS and MOSCOW — A Proton M Block DM rocket failed on Dec. 5, sending its payload of three Glonass satellites crashing into the Pacific. Russian space agency Roscosmos says the rocket failed to achieve its intended orbit and an inquiry has been opened to investigate the cause . But the agency, prime contractor Khrunichev and International Launch Services, which markets commercial versions of the Proton M, all declined to offer specifics. Russian news agency RIA Novosti says the ...


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