É provável que Steve Rogers soubesse disso, desde que se passou algum tempo desde o Homem de Ferro 3.[we see Tony undergoing surgery to remove the shrapnel near his heart]
Tony Stark: [voice over] Of course, there are people who say progress is dangerous. But I'll bet none of those idiots ever had to live with a chest full of shrapnel. And now...neither will I. Let me tell you, that was the best sleep I'd had in years.