
1) Soviet invention
Found on
https://www.crosswordclues.com/clue/molniya
[explosive trap] Certain buried or otherwise concealed containers used by the KGB to cache items such as shortwave radio receivers and cryptographic materials were booby-trapped with an explosive device known as Molniya (`lightning`). A sequence of specific actions had to be taken in the correct order to render the device safe prior to movi...
Found on
http://en.wikipedia.org/wiki/Molniya_(explosive_trap)

Molniya-2 Russian communications satellites; `Molniya” means `lightning”. All move in highly elliptical, 12-hour orbits, with perigees (low points) of no more than a few hundred kilometers and apogees (high points) of up to 40,000 km. Such orbits, that have become known as Molniya-type orbits, ...
Found on
http://www.daviddarling.info/encyclopedia/M/Molniya.html

Molniya 1 was a Soviet communications satellite launched in April 1965 and placed in a highly elliptical orbit designed to provide the longest possible communications sessions between Moscow and Vladivostok. Molniya 1 was the first Soviet communications satellite.
Found on
http://www.probertencyclopaedia.com/browse/GM.HTM

one of a series of Soviet communications satellites.
Found on
https://www.infoplease.com/dictionary/molniya
No exact match found.