US Air Force/TSgt. Rachelle Blake US Air Force crews training to fly the RC-135 have had to travel to train after flooding at Offutt Air Force Base in Nebraska. The Air Force is using RC-135s on other flight lines, but damage to simulators at Offutt means crews have gone as far away as the UK for comparable training. Visit Business Insider's homepage for more stories. The recent flooding at Offutt Air Force Base, Nebraska, has slowed down mission crew training on the RC-135 intelligence, surveillance and reconnaissance aircraft, leading the Air Force to send airmen as far away as the United Kingdom to train, according to a top general. Gen.