U.S. Marine Corps Lt. Col. Paul C. Teachey, right, the commanding officer of the Black Sea Rotational Force 16.2, exchanges challenge coins with Skip Witunski, the president of the U.S. Navy League, during the 114th annual Navy Day celebration at the Port of Constanţa, Romania, Aug. 15, 2016. U.S. Sailors and Marines supporting the Black Sea Rotational Force 16.2 helped pay tribute to the prestigious history of the Romanian navy and highlighted the military’s movement toward new developments and modernizations. Black Sea Rotational Force is an annual multilateral security cooperation activity between the U.S. Marine Corps and partner nations in the Black Sea, Balkan and Caucasus regions designed to enhance participants’ collective professional military capacity, promote regional stability and build enduring relationships with partner nations. (U.S. Marine Corps photo by Sgt. Michelle Reif)

Photo by Sgt. Michelle Reif