A graduate of Columbia University, Mr. Greenberg was commissioned ensign from the N.R.O.T.C. in 1953. He served aboard USS Randolph (CVA-15), and then as training officer at Recruit Training Command, Bainbridge, Maryland, in 1954. From 1957-60, he was a congressional reporter on the Washington Post and was awarded a fellowship by the American Political Science Association to study congressional activities in 1960-61. He is at present a Staff writer for Science Magazine.