
Rep. Sean Casten @RepCasten
It was an honor to meet with Dr. Dieter Gruen, a Manhattan Project Scientist and pioneer in solar technology. His work has resulted in over 60 U.S. patents. Despite having “retired” a few years ago at age 90, he’s still going strong! https://t.co/8fTbMvOquM — PolitiTweet.org