In two thousand 12, facebook had to perform the mother of all der loops. Its usurs were migrating from dest top computers to mobile devices at a startling rate. Charilan mark faced a tough decision and made it incredibly well. But then you know what happened the next day? Nothing. People still came in with their desk cops screen shots because that's what they knew how to build. You can't overestimate this kind of diversity. It's fortunate that sherell and mark balance each other out.