Tracer Rounds A U.S. Air Force joint terminal attack controller marks a target with tracer rounds during a call-for-fire training event at an undisclosed location in Afghanistan in support of Resolute Support, March 6, 2020. ORS is a NATO-led train, advise, and assist mission seeking reconciliation and peace for Afghanistan. SHARE IMAGE: Download Image: Full Size (1.72 MB) Tags: nato Photo By: Air Force Staff Sgt. Joel Pfiester VIRIN: 200406-F-PD075-0390R.JPG Photo Gallery