Remember Slingshot, Facebook’s answer to — well, nothing and everything, really. The messaging platform tried hard to provide a secure environment, but the "send-to-receive" thing fell flat. To see a message, you had to send one, and it was just clumsy and strange. In version 2.0, which Facebook announced today, they’ve stripped that functionality away, instead opting for a more grounded approach. Now, sent messages will appear in a timeline, and your recipient has the option to react privately.