A group of Bulgarian paratroopers descend into Cheshnegirovo drop zone after performing a static-line jump in Plovdiv, Bulgaria, Oct. 2, 2019. During Thracian Fall, the 37th Airlift Squadron provided primary airlift support to a U.S.-sponsored military free-fall course for Bulgaria’s 68th Special Forces Brigade, resulting in a total of 121 personnel drops. (U.S. Air Force photo by Staff Sgt. Kirsten Brandes)