Facebook CEO Mark Zuckerberg points to a drone flying behind him during his keynote address at the F8 Facebook Developer Conference Tuesday, April 12, 2016, in San Francisco. Facebook says people who use its Messenger chat service will soon be able to order flowers, request news articles and talk with businesses by sending them direct text messages. At its annual conference for software developers, Zuckerberg said the company is releasing new tools that businesses can use to build "chat bots," or programs that talk to customers in conversational language. (AP Photo/Eric Risberg)