"Romanoff does. She's been tailing him since last night." Sam jogged next to Steve for a moment before he stopped. "I'm going to refuel your plane. Maybe you should have stayed with Stark, though. He was in Manhattan last time she checked in."

Not just in Manhattan. He was in the Tower. Natasha lost visual with the Soldier twenty minutes before Steve had landed and by the time the blond got back to the plane with Sam, suited up, she had called in to confirm that she lost him somewhere around the Tower.

And that was because he had a score to settle with Stark. His programming had kicked back in a few weeks back. Base wasn't answering his calls but he had found Stark. He thought he killed the man and his wife but it appeared he had just changed his name.