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Six U.S. service members were killed when a KC-135 refueling aircraft crashed in western Iraq Thursday afternoon after a mid-air incident with a second aircraft, officials confirmed.
A U.S. KC-135 refueling aircraft went down in western Iraq around 2 p.m. ET, U.S. Central Command confirmed early Friday. All six crew members aboard the aircraft have been confirmed dead.
The other aircraft involved in the incident landed safely, CENTCOM said. Officials said the loss of the aircraft was not the result of hostile fire or friendly fire.
The identities of the service members are being withheld pending notification of next of kin and will be released 24 hours after those notifications are complete.
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The circumstances surrounding the incident remain under investigation.
The KC-135 Stratotanker is a U.S. Air Force aircraft that refuels other planes midair, allowing them to fly longer missions without landing. It can also be configured for medical evacuations and surveillance, according to the Air Force.
Based on the Boeing 707 design, the KC-135 has been in service for more than 60 years, supporting the Air Force, Navy, Marine Corps and allied aircraft. The Air Force is gradually replacing the aging fleet with next-generation KC-46A Pegasus tankers.
Despite upgrades, concerns have been raised about the durability of the older aircraft. The Congressional Research Service reported that the Air Force operated 376 KC-135s last year across active duty, the Air National Guard and the Air Force Reserve.
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A standard crew includes a pilot, co-pilot and boom operator, who controls the refueling boom from the rear of the aircraft. Some KC-135s are also equipped with wing-mounted pods and can carry cargo or passengers when needed.
A second US official said another KC-135 was involved in the incident and landed safely in Israel, according to Israel’s ambassador to the United States.
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The crash follows last week’s mistaken downing of three US F-15E fighter jets by friendly Kuwaiti fire.
Refueling tankers could become increasingly important if the conflict with Iran continues, as US aircraft may need to fly longer missions deeper into the region.
The Associated Press contributed to this report.
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