Well, it was meant to be "them," anyway. But that's not how it worked out. Steve Rogers-- Captain America-- he was the first test subject. And also the last. The scientist in charge of the program was assassinated, and his research went with him. Since then, people have been trying to recreate the formula for decades-- without much success, I might add.

[At some point during that she preps Reiner's arm and sticks a needle in, but she manages to carry on talking like they're sitting over a cup of coffee in a cafe.]