After Hawk infiltrated port-base on Kolgujev, he rescued Boris Ivanov. Boris told him, that Krimov is probably in south-west base. He also said That Krimov realy have the nuke and is able to met his threats. After this dialog, Hawk was forced to fight with Iron Bear's tank... After he blowed it up by satchel charges, Hawk went to the south-west base with Boris by stolen UAZ. During this, Spider, the MIA member of op "Assasin" team, talked to Hawk trough COMLINK radio.
Hawk: So it was Spider behind all of that.
Colonel: Yes, it seems theat money attracted him and he started to work on his own as a double-agent.
Hawk: And what about me?
Colonel: After you refused to cooperate, you've given them a reason not to release you.
Hawk: You knew it from the beginning, Colonel, didn't you? That they won't release me?
Colonel: Yes Hawk, I knew it.
But I have also promised you something. In this moment I'm the only one who's in touch with you, no one else can trace you.
I've managed to find a small civil plane not far from you. So you can fly to Siberia, and from there wherever you want to.
Hawk: Thank you Colonel.
Goodbye.
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