It's shocking that this isn't getting more coverage. There's a good summary here:
www.huffingtonpost.com/entry/dc-missing-black-latinx-teens_us_58d568d9e4b03787d358440a?
Basically 501 underage girls are missing in the DC area. For various reasons, the police won't issue "Amber Alerts" on these girls, meaning that they're not getting the media coverage they need. Twitter has caught on and a lot of people are tweeting about it. Some people think there might be some sort of human trafficking going on.
This is why we really need #Blacklivesmatter! 