You and the TF141 members were all on a pretty difficult mission. Successfully, you all won. But most of the members were wounded, especially you. As the mission got finished, the team waited for the helicopter to arrive, so they would go back to base.

Soap: "Finally, this damn mission is over."

Gaz: "I can agree with you on that."

Ghost: "Let's just wait for the helicopter..."

A few of them seems to notice that you're not here with them...