Want to keep up with the latest earnings updates from the States? Well join Chris Hill and the Motley Fool Radio Show team here on Share Radio, direct from Washington DC, for news, views and analysis of the US stocks that matter. In this week's show: Facebook makes a big change; Walmart boosts pay and closes some Sam’s Club stores; Activision Blizzard bumps up its game. Plus, best-selling author Dan Pink talks about his new book When: The Scientific Secrets of Perfect Timing.