NATO AWACS (Airborne Warning and Control System) reconnaissance planes flew their 1000th flight over Eastern Europe on Oct. 5, the alliance said.
By Airwolfhound from Hertfordshire, UK (E-3 AWACS – RIAT 2012) [CC BY-SA 2.0], via Wikimedia Commons
The flights were to monitor the situation in Ukraine after Russia annex Crimea in March 2014.