TENCAP is an acronym for Tactical Exploitation of National Capabilities, a collection of programs that involve developing tactical (battlefield) applications out of reconnaissance satellite capabilities (which are normally thought of as strategic).
“Special” almost invariably means “black” or highly classified.
The phrase “Oderint Dum Metuant” is associated with Caligula, the First century Roman emperor whose name became synonymous with depravity, madness, cruelty, and tyranny. It translates “Let them hate so long as they fear.”