This is a very interesting video and well worth taking time to watch it.
[video=youtube;lLAFhTjsQHw]http://www.youtube.com/watch?v=lLAFhTjsQHw&feature=player_embedded[/video]
[video=youtube;lLAFhTjsQHw]http://www.youtube.com/watch?v=lLAFhTjsQHw&feature=player_embedded[/video]