In Kennedy Recordings, History’s Raw Materials September 22, 2012, New York Times By KATHARINE Q. SEELYE http://www.nytimes.com/2012/09/23/us/in-kennedy-secret-recordings-historys-raw-materials.html?partner=rss&emc=rss&src=ig&pagewanted=print BOSTON — President John F. Kennedy opened the newspaper one day in 1963 and learned to his horror that military aides had built a hospital bedroom for his pregnant wife at an air base on Cape Cod in…