"From him," Tony says heavily. "He didn't... trust himself with it. He knew I was the person who was most likely to be able to stop him, if he, you know, fell off the wagon. Went back to... how he was."

Seeing Howard's skepticism, he adds, "I know it's real, I tested it. And he's never tried to take it from me." He'd asked for it, once, but he hadn't tried to force Tony to give it up.