A soldier of the Polish Army sits in a tank as a NATO flag flies behind during the NATO Noble Jump military exercises on June 18, 2015 in Zagan, Poland. (Sean Gallup/Getty Images)
NATO Holds Noble Jump Exercises Of VJTF Forces
A soldier of the Polish Army sits in a tank as a NATO flag flies behind during the NATO Noble Jump military exercises on June 18, 2015 in Zagan, Poland. (Sean Gallup/Getty Images)