NATO Air Base Geilenkirchen in Western Germany has been placed on high alert due to a potential threat. The security level was raised based on intelligence information indicating the threat, prompting the precautionary measure of sending all non-mission essential staff home. The base, which is the main hub for NATO's fleet of E-3 'Sentry' Early Warning and Control Aircraft, remains operational under heightened security protocols. The specific nature of the potential threat has not been disclosed.
