This 12x18 framed Thomas Keith Glennan piece includes an original vintage 1959 glossy press photo of Dr T Keith Glennan announcing the first 110 Mercury astronaut candidates along with a photo of the original Mercury 7 astronauts.   Also included is a rare Glennan signed original 1962 Postal Cover Commemorating the first successful orbital flight by an American John Glenn.  This rare find is a must-have for any space industry enthusiast. This autographed Mercury Postal Cover from former NASA Administrator Thomas Keith Glennan, signed with certification by JG Autographs, is an original and authentic piece. The signature of Glennan, a pioneer in the development of the United States space program, adds value to this collectible item. The Postal Cover is a unique piece of history, signed by the man responsible for the early days of NASA and the development of space exploration. This item is perfect for collectors of space memorabilia and autographs.