Chris' session was a deep dive on the Virtual Earth Platform and goes into some details about our UltraCam digital aerial camera that we use to capture imagery. He also talks about how we create 3D models and some cool demos as well on Virtual Earth. Finally he does the Silverlight VE control demo that he showed at MIX 08. Steve's session went deep on the Collections stuff that he works on in the Virtual Earth team. He also showed some of his favorite Map Cruncher Collection demos as well as others. There's also a little surprise at the end of this video that if you were around three years ago when Virtual Earth was created you might have seen.