. . "1971-04-01Z"^^ . . . "Retired" . "The Delta E, or Thor-Delta E was an American expendable launch system used for twenty-three orbital launches between 1965 and 1971. It was a member of the Delta family of rockets.The first stage was a Thor missile in the DSV-2C configuration, and the second stage was the Delta E, which was derived from the earlier Delta. Three Castor-1 solid rocket boosters were clustered around the first stage."@en . "23"^^ . . "23"^^ . "1965-11-06Z"^^ . .