US military bases across Europe raise state of alert to highest in decade due to possible terrorist threats
![US military bases across Europe raise state of alert to highest in decade due to possible terrorist threats](https://static.independent.co.uk/2020/12/15/17/PRI173803792.jpg?width=1200&auto=webp)
Official says they haven’t seen threat level ‘Charlie’ in over a decade and that it indicates the US military has likely received an ‘active-reliable threat’