The Ramstein Flag 25 exercise, held at Leeuwarden Air Base in the Netherlands, brings together NATO air forces to test their ability to conduct complex large-scale operations. "We are worrying about the whole eastern flank and what is happening in Ukraine...we have to be pretty sharp and ready for everything", says Lieutenant Colonel Rami Lindstrom, Commander of the 31st Fighter Squadron at the Karelia Air Wing in the Finnish Air Force. IMAGES AND SOUNDBITES