Priscilla Zuckerberg from San Francisco for a Chan Zuckerberg Initiative announcement.

Priscilla Zuckerberg from San Francisco for a Chan Zuckerberg Initiative announcement. Live with Priscilla from San Francisco for a Chan Zuckerberg Initiative announcement. https://twitter.com/markzuckvideos http://ift.tt/2i2KiTx http://ift.tt/2hTFQIO http://ift.tt/2i2SOBT