HelloCity
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![abcnews.go.com](https://s.abcnews.com/images/International/US-military-bases-4-gty-jm-240630_1719777533664_hpMain_16x9_992.jpg)
Several US military bases in Europe put on heightened state of alert, US officials say
Several U.S. military bases across Europe are now operating under a heightened state of alert, ABC News has confirmed.
‘Charlie’ indicates an attack is imminent or currently occurring.