Black Swan 21 Special operations forces from Austria, Croatia, Hungary, Slovakia, Slovenia and the United States participate in vehicle interdiction training as part of Black Swan 21 in Szolnok, Hungary, May 12, 2021. SHARE IMAGE: Download Image: Full Size (0.79 MB) Photo By: Army Spc. Therese Prats VIRIN: 210512-A-RQ926-1039.JPG Photo Gallery