I heard George Crabtree when he first announced the program. George is a very well prepared speaker, who is a really good communicator. I am always amazed at the amount of info he can pack into slides, and make them seem perfectly sensible.
I highly recommend watching this program. If you are interested in attending the next talk, these talks are open, and while they like an advance registration, that is more for clearance into the facility than anything else. The webcast is great but you miss the fellowship as well as the coffee and cookies.