The character, Chad McKnight, calls his mother and tells her they killed more Russians than in the movie Red Dawn, then he specifies he means the first movie. C. Thomas Howell who plays Haggerty the EOD guy was in that 1984 movie.
Ava Winters is introduced in as a "agent" with the CIA by the CIA director. The CIA does not have "agents." They have officers. Most likely, Ava Winters is an officer assigned to the CIA's National Clandestine Service.