Bucky's reaction was to tense immediately at the sound of american-accented Russian, searching for escape routes practically on instinct and a second away from just bolting into a run regardless of who was behind him, but he forced himself to take stock of the situation in a nearby shop window, scanning the reflected crowd for whoever had spoke, there was something familiar about the voice that he hadn't quite been able to place.

When he spotted Jason, some of the tension eased slightly, and he turned slowly to face the other man - although it was clear from his posture that he was still ready to bolt if he needed to.

"What are you doing in Russia?" was his first question, the most important as far as he was concerned.