170502-N-TB410-0416 ARABIAN GULF (May 2, 2017) Seamen Paul Greene, left, and Brandi Harrington, both assigned to the Arleigh Burke-class destroyer USS Mahan (DDG 72), look for contacts as A Royal Saudi Navy Patrol Gunboat pulls alongsid during replenishment-at-sea training during Exercise Nautical Union 17. The bilateral multi-dimensional exercise between the U.S. and Saudi Arabia, which 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)