AdvertisementFrom NPR News In Washington: A Carl Kasell TributeDecember 07, 2009facebookEmailCarl Kasell's radio career spans more than 50 years — 30 of them at NPR. He joined NPR as a part-time newscaster in 1975. Why sign off now? Kasell jokes that he's just tired of waking up every morning at 1 a.m. (NPR)