Earlier today, several US military aircraft, including KC-135R Stratotanker aerial refuelers and CV-22B Osprey helicopters based at RAF Mildenhall were dispersed from the base and relocated within the US European Command.
A US official told TWZ that enhanced force protection measures had been put in place at RAF Lakenheath and RAF Mildenhall. WSJ reports that the plane was dispersed due to a threat from Iran.
FPCON Charlie was placed in place, indicating a probable threat of "terrorist" action against the facilities.