170805-N-NG136-105 ATLANTIC OCEAN (Aug. 5, 2017) Royal Navy Trafalgar-class submarine HMS Trenchant and Royal Navy Wildcat HMA2 helicopter assigned to Type 23 frigate HMS Iron Duke (F234) participate in a passenger exchange during exercise Saxon Warrior 2017. The U.S. and United Kingdom co-hosted carrier strike group exercise that demonstrates interoperability and capability to respond to crises and deter potential threats. (U.S. Navy photo by Mass Communication Specialist Seaman Zachary Wickline/Released)