LIELVARDE AIR BASE, Latvia -- The 435th Contingency Response Support Squadron air advisors, Michigan Air National Guard and Latvian Air Force collaborated over the past five years to complete an instrument flight rules certification, establish an air traffic control program and other airfield operations programs necessary to meet International Civil Aviation Organization standards. Lielvarde AB can now host Baltic air policing missions, future U.S. and NATO exercises and continue Agile Combat Employment operations in the region.