British soldiers (left), assigned to the Coldstream Guards, take a look at an M4 carbine rifle while a Romanian soldier (right), assigned to the Romanian Land Forces, takes a look at an M110 semi-automatic sniper system during a display by troopers assigned to 2nd Squadron, 2nd Cavalry Regiment, showing the weaponry that they are assigned and use while training, after participating in the opening ceremony for Wind Spring 2015 at Smardan Training Area, Romania, April 16, 2015. The Wind Spring 2015 exercise is aimed at maintaining and increasing interoperability between NATO allies. (U.S. Army photo by Sgt. William A. Tanner/released)