"Retired" . . . . "Atlas E/F"@en . . . . "The Atlas E/F, also designated SB-1A was an American expendable launch system and sounding rocket built using parts of decommissioned SM-65 Atlas missiles. It was a member of the Atlas family of rockets.The first stage was built using parts taken from decommissioned Atlas-E and Atlas-F missiles, with various solid propellant upper stages used, depending on the requirements of the payload. The Atlas E/F was also used without an upper stage for a series of re-entry vehicle tests."@en . . "9"^^ . . "56"^^ . "1965-08-04Z"^^ . . . "2001-03-24Z"^^ . . "65"^^ .