U.S. Air Force F-16 Fighting Falcon aircraft await refueling from a KC-135 Stratotanker aircraft assigned to the 351st… https://www.rawpixel.com/image/8728028/photo-image-airplane-public-domainFree Image from public domain licenseThe Dutch hydrographic survey vessel HNLMS Luymes (A803), left, comes alongside the Danish ocean patrol vessel HDMS Thetis… https://www.rawpixel.com/image/3318795/free-photo-image-baltic-sea-baltops-2014-battleshipFree Image from public domain license