170502-N-TB410-0383 ARABIAN GULF (May 2, 2017) A Royal Saudi Navy Patrol Gunboa pulls alongside the Arleigh Burke-class destroyer USS Mahan (DDG 72) while conducting replenishment-at-sea training in the Arabian Gulf during Exercise Nautical Union 17. the bilateral multi-dimensional exercise between the U.S. and Saudi Arabia promotes interoperability, cross-training and maritime security operations designed to reassure allies and partners, preserve the freedom of navigation and the free flow of commerce in the region. (U.S. Navy Combat Camera photo by Mass Communication Specialist 1st Class Joshua Bryce Bruns/Released)