"This is the psychedelic music show at AFVN. I'm Army Specialist Zack Johnson, our APO here is 96309. If you send a request to that number, what we do is we open it like this (opens a letter and starts playing a song) ...and when it arrives we read it, pull out that record and play it on the air. Like this one; 'Fortunate Son' by CCR."
When the mission starts, players hears Zack Johnson speaking on the radio which is most likely transmitted over loudspeakers around the base. As Mason and Hudson are about to meet Woods when he lands, Johnson then plays the song Fortunate Son by Creedence Clearwater Revival. This same song plays at the end of the mission when Bowman arrives.
Johnson can be heard in the mission "Crash Site". When the player first gets on the boat with Woods, Bowman and Reznov, Woods turns on the radio where Johnson says '...goes out to Seargent Blundell, and all our boys at the RPO. Go get 'em'. The song Sympathy for the Devil by The Rolling Stones is then played.