U.S. refuelling plane crashes in Iraq Four of six crew members aboard a KC‑135 are confirmed dead after crashing in western Iraq, with rescue efforts ongoing and an investigation underway, the U.S. military says Crew: At least three – pilot, co-pilot and boom operator. Backup team sometimes included in long flights Powerhouse: Four Pratt & Whitney TF33-PW-102 engines Flying boom: Can transfer up to 90 tonnes of fuel mid-air to wide range of aircraft used by U.S. Air Force Aerial refuelling requires steady flight and precise coordination between pilot and boom operator KC-135 STRATOTANKERLength: Height: Wingspan: Max. speed: Unit cost: 41.5 metres 12.7 metres 39.9 metres 933km/h $39.6 million Persian Gulf Red Sea Caspian Sea Mediterranean Sea Tehran Baghdad 60 miles 100km JORDAN SAUDI ARABIA KUWAIT EGYPT LEBANON SYRIA TÜRKIYE ISRAEL IRAN IRAQ Tel Aviv Turaibil Mar 12, around 19:00GMT: Plane crashes near Turaibil, along Iraqi-Jordanian border. Crash not due to hostile or friendly fire, U.S. military says Tel Aviv: Second KC‑135 tanker, believed to have been involved in incident, declares emergency before landing Sources: CBS News, USAF Picture: Getty Images © GRAPHIC NEWS