Black Swan 17 U.S. Army Special Forces soldiers clear a stairwell during Exercise Black Swan in Szolnok, Hungary, July 18, 2017. Black Swan was a Hungarian-led special operations forces exercise held June 26 to July 22 across locations in Bulgaria, Hungary and Romania and included participants from over eight countries. Army photo by Staff Sgt. Aaron Duncan SHARE IMAGE: Download Image: Full Size (2.46 MB) Tags: Special Forces, SOCEUR, sof, Black Swan 17, Soldiers, Army Photo By: Staff Sgt. Aaron Duncan VIRIN: 170718-A-DL944-002.JPG Photo Gallery