Fig. 2From: Exposure to lead-free frangible firing emissions containing copper and ultrafine particulates leads to increased oxidative stress in firing range instructorsAir flow velocities and direction at firing line for classes at WPAFB and JBC. A Air velocity measured over three days at WPAFB for the indicated class types. B Air velocity measured at JBC for the indicated class types. C Directional air flow velocities measured at WPAFB. D Directional air flow velocities measured at JBC. Measurements were made at each base prior to or after each of the M9. M4, and M4/M9 classesBack to article page