Earlier this week, we were shown the first 10 minutes of Captain America: The Winter Soldier, which opens with Steve Rogers (Chris Evans) meeting Sam Wilson (Anthony Mackie) in Washington D.C. That chance meeting will prove to be very important, as showcased in a new featurette. Producer Kevin Feige explains that Cap gets to a point where he isn't sure who he can trust, with Chris Evans adding that he decides to trust a stranger, Sam Wilson, who eventually becomes The Falcon. We also hear from Scarlett Johansson (The Black Widow), who reveals that this sequel delves into several conspiracy theories, as well as Anthony Mackie and Robert Redford (Alexander Pierce), in this behind-the-scenes video for this Marvel Phase Two sequel, in theaters April 4.