Defense forces worldwide fly two variants of the AH-64 multimission combat helicopters: the AH-64A Apache and the next-generation version, the AH-64D. Equipped with radar, the aircraft is known as the AH-64D Apache Longbow. Without radar, it is the AH-64D Apache. (In the United Kingdom, where all next-generation Apaches will have radars, Apaches in production by GKN Westland Helicopters, Limited, are designated WAH-64s.) The AH-64D Apache Longbow is the newest version of the combat-proven AH-64A Apache and fulfills attack helicopter and reconnaissance requirements of several armed forces worldwide.