Even if Bucky was able to make it out of the museum with the shield undetected, stealing it at all was a bad idea. He pinched the bridge of his nose. What a mess. He could just imagine Sam's reaction to Bucky's plan regarding Zemo. At least one out of the pair hadn't completely lost their mind.
Steve went back to pacing. His mind was turning over the other super soldiers. And Isaiah. No wonder Zemo had (presumably) agreed to help them. He hadn't hesitated to kill the other Winter Soldiers in Siberia. It was a miracle he hadn't tried to kill Bucky. Or maybe he had? Steve glanced at his boyfriend.