[She recognizes the voice immediately, even if the person who it belongs to looked a lot different the last time she saw him. He's also supposed to be dead, so if she looks shocked when she looks up from the map, Bucky shouldn't be surprised]

If this is a joke, it's a really tasteless one. Some people might have a problem with guys walking around impersonating dead men. [Not that it's unheard of for people to come back from the dead in their line of work but she's sceptical]