
1) Sneak
Found on
https://www.crosswordclues.com/clue/oko

OKO is a complex of buildings located on plot 16 in the Moscow International Business Center in Moscow. The site is divided into 16a and 16b. Section № 16a On the section 16a two high-rise buildings will be built, one of 49 storeys and 245 meters high (North Tower), and the other of 85 storeys with a height of 352 meters (South Tower). Each buil...
Found on
http://en.wikipedia.org/wiki/OKO

Oko (Око meaning Eye in old Russian), is a Russian (previously Soviet) missile defence early warning programme consisting of satellites in Molniya and geosynchronous orbits. Oko satellites are used to identify launches of ballistic missiles by detection of their engines` exhaust plume in infrared light, and complement other early warning facil....
Found on
http://en.wikipedia.org/wiki/Oko

Russian military satellites placed in Molniya-type orbits. They are equipped with an infrared telescope and are intended to provide early warning of missile attacks. `Oko” means `eye.”
Found on
http://www.daviddarling.info/encyclopedia/O/Oko.html
No exact match found.