Applying Oxygen Army Reserve Sgt. Jeffrey Johnson applies oxygen with a bag valve mask to a dummy casualty during a Joint Training Exercise at the Miami-Dade Fire Rescue Urban Search and Rescue Training Site in Miami, Jan. 10, 2018. Johnson is assigned to Combat Support Hospital Detachment 8. Army photo by Spc. Andrea Salgado Rivera SHARE: Download: Full Size (1.33 MB) Tags: Northcom, Northern Command, Soldiers, Army, training Credit: Spc. Andrea Salgado Rivera VIRIN: 180110-A-XH098-0039A.JPG Photo Gallery