USAF's F-16s from 555TH FS 'Triple Nickel' Aviano AB head to Bulgaria for Thracian Viper exercise

Six F-16s from the 555th Fighter Squadron at Aviano Air Base in Italy arrived in Bulgaria Friday for training exercises with the Bulgarian, Greek and Romanian air forces. 

Other airmen and units from U.S. Air Forces in Europe-Air Forces Africa ― including airmen from the 435th Air Ground Operations Wing at Ramstein Air Base, about 150 airmen from the 555th, and additional Aviano airmen ― are also joining the 555th for Thracian Viper 20, USAFE said in a Friday release. 

Thracian Viper, which began Friday and will run until Sept. 25, is a multilateral training exercise that aims to improve the allies' ability to work with and fight alongside Bulgaria, the release said. It is taking place at Graf Ignatievo Air Base in Bulgaria. 

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