🚨Mystery "Space Activity" Forces USAF Antarctic Mission to Turn Back A US Air Force C-17 heading to Antarctica was forced to turn around after a warning of potentially hazardous "space activity." The aircraft departed Christchurch under the call sign ICE28 and flew south for more than two hours before abandoning the mission. New Zealand's Civil Aviation Authority confirmed that the decision followed a NOTAM warning of "space activity, potentially hazardous to aviation en route to Antarctica....