I have no idea what I’m doing wrong with utilizing twitter cards, it seems simple but I can’t make it work. Please take a look. https://twitter.com/tl5710/status/607812446259011584
If you attach an image to Tweet, the image will take priority over the Card. If you remove the image (and the Card is implemented correctly) the Card should render.
You also have two URLs. A Card will only render for the first URL.
