 Captain America would not learn of Zemo's scheme for several weeks, by which time he would defeat Red Skull for the final time during World War II, burying Red Skull alive in a state of suspended animation.By the time that Captain America learned of Zemo's plot, it was too late and both Captain America and Bucky were taken prisoner by Zemo.Zemo tied the two heroes to the experimental plane, which was now booby-trapped to explode, and launched them to their deaths.