denied the request. The military liaison committee subsequently requested the warhead be in production by the rocket availability date of January 1957. The weapon was to have maximum interchangeability of components with other weapons, provided that it did not compromise the weapon's sealed design. The weapon would be capable of storage in a ready-to-operate condition for at least 30 days, with 90 days being desirable, as long as such a requirement did not delay the production date. The warhead would be capable of operation up to , with being desirable. Diameter would be with length and weight being held at a minimum. Concern was expressed at this time over the use of thermal batteries in the weapon, because all the components needed to produce detonation would be present inside the warhead. An evaluation was therefore made and a report released in April 1955, describing several safing options that could be used. Eventually an automatic safe/arm device was selected, that disconnected the high voltage connections to the detonators. By placing it inside the warhead and not in the warhead adaption kit, it became possible for the system to also short the x-unit capacitor and thermal battery. By May 1955, the rocket, the AIR-2 Genie, was taking shape. Unguided, the rocket would have a range of and a velocity of over its launch speed. Length would be , diameter with fins retracted of and with fins extended . The warhead was pressurized to at the factory to prevent high-voltage arc over at altitude. In June 1955, the air force requested an acceleration of the warhead production program, which would produce an interim warhead for short-term deployment that would be replaced by production Mark 25 warheads as they became available. The interim warheads were to be called the EC-25 (emergency capability warhead), while production warheads were to be called the Mark 25 Mod 0 or W25-0 warhead. Design release was scheduled for July 1956, with the first production warheads being produced in June 1957. Emergency capability warheads were produced beginning in December 1956. Initially, the rocket was certified for the F-86 Sabre, with later capability with the F-101 Voodoo and F-106 Delta Dart as the aircraft became available. The weapon was hailed as a major achievement as it was believed to be of a new generation of weapons that required little maintenance or inspection — a "wooden" bomb, likened to that of needing