In addition to Fortune's 40 Under 40 list, we're also keeping our eye on these 20 innovators, young guns from a wide range of industries and backgrounds.
|SpaceX makes history: It launches a used rocket and then lands it in the ocean|
|Congress could kill state retirement plans|
|Lone holdout delays approval on Trump University settlement|
|Facebook takes aim at GoFundMe, crowdfunding sites with personal fundraising tool|
|Sears stock is up 50% in a week. What the heck is going on?|