Just to try and be helpful, the name of the song the Ominous Chorus are singing is 'Polyushka Polye', a folk song.
At the end of the level, "Battle of Pine Valley," you're being overrun by Soviets from all sides. Suddenly, you hear a static-filled transmission from the USS Missouri, which promptly wastes a squad of Soviet tanks. Then Sawyer gives you command of its guns.
Bannon Calling down a Goddamn Nuke on his position to keep the Soviets from getting to the SDI.
The cutscene that plays during the New York mission after you save the Statue of Liberty from the Spetznaz commandos trying to use it to fire chemical weapons into Manhattan. If you fail, an airstrike will destroy the statue.
Colonel Sawyer: "I see green smoke! Call off the strike, damn it!"
Radioman: "This is Eagle Six, abort! Abort! Abort!"
Colonel Sawyer: (to himself) "Good work, Parker."
Two fighters swoop by, showing you were seconds from watching the Statue of Liberty be destroyed.
Colonel Sawyer: "Well, done, lieutenant. That was above and beyond the call. We should carve your name into the base for what you've done today."