Facebook's Slingshot Draws a Bead on Snapchat

I'll show you mine if you'll show me yours. That's the idea behind a new photo-sharing app Facebook released Tuesday for Android and iOS devices. Slingshot lets you send an image or video to a group of friends. However, they can't view what you've sent until they first send you something. After that, they can view what you sent them and either respond to it or swipe it into oblivion. Slingshot appears to be targeting Snapchat, one of the most popular image-sharing apps in the market.