The '''KC-135 Stratotanker''' is a [[USAF]] aerial refueling aircraft that extends the range and endurance of [[military]] [[aircraft]] worldwide, first entering service in 1957 and remaining operational as of 2026. | The '''KC-135 Stratotanker''' is a [[USAF]] aerial refueling aircraft that extends the range and endurance of [[military]] [[aircraft]] worldwide, first entering service in 1957 and remaining operational as of 2026. |