https://www.openstreetbrowser.org/#map=15/51.7326/6.2707&categories=military 51.73, 6.27 Official sources:  https://installations.militaryonesource.mil/in-depth-overview/kalkar-u-s-air-force-element – https://www.japcc.org/ Campaign info (DE): http://demo-kalkar.de/ against NATO Joint Air Power Competence Centre (JAPCC)