Find out why a shuttle launch brought a former astronaut mixed emotions . TL;DR Default ? The space station is the last outpost of human civilization on Earth and it will be decommissioned in July. Discover why President Obama delivered a high school graduation address . Use the Daily Discussion to help students understand today 's featured news stories .
Find out why a shuttle launch brought a former astronaut mixed emotions . TL;DR The space station is the last outpost of human civilization on Earth and it will be decommissioned in July. Discover why President Obama delivered a high school graduation address . Use the Daily Discussion to help students understand today 's featured news stories .