The In Ekker series was a group of 13 underground A-bomb nuclear tests and 5 bombs explosions for the Mirage IV conducted by France between November 1961 and February 1966. The bombs were detonated at the Oasis Military Experiments Centre near In Ekker, French Algeria at the Tan Afella in the Hoggar Mountains, by the Nuclear Experiments Operational Group (GOEN), a unit of the Joint Special Weapons Command. The series saw the explosion of the first AN-11/21 bombs and was followed by the 1966–70 series.