On the 30th anniversary of the Challenger disaster, here's a look at how NASA's first in-flight tragedy changed their shuttle program forever. http://cnn.it/1OZV9pD | CNN

611K views · 10K reactions | "We won? We won?" This is the moment Ayanna Pressley learned she won a primary race in Massachusetts, defeating a 10-term Democratic member of Congress in a stunning upset https://cnn.it/2wFf0d0 | CNN | Facebook