U.S. Air Force pararescuemen conduct Military Tandem Tethered Bundle (MTTB) training, Paso Robles, Calif., Sept. 24, 2013. The 131st Rescue Squadron based at Moffett Federal Airfield, Calif., hosted the event, training with pararescuemen from all around the Air Force. The tethered bundles can carry a variety of equipment and weigh hundreds of pounds. (U.S. Air Force photo by Senior Airman John D. Pharr III/Released)