A parachute cord is tied in a quick release knot at Plovdiv Airport, Bulgaria, Aug. 31, 2021. Thracian Summer 2021 is a bilateral training event designed to enhance operational access and global freedom of action while strengthening partner interoperability, joint readiness, and assuring regional allies and partners of joint capabilities. The 37th Airlift Squadron has participated in C-130J Super Hercules training with Bulgaria at least once a year since 2008.

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