Airmen 1st Class Elizabeth Bolanos and Steven Fischer perform a dynamic entry. U.S. Air Force Airmen 1st Class Elizabeth Bolanos (left) and Steven Fischer, police officers with the 28th Security Forces Squadron, perform a dynamic entry during training at Ellsworth Air Force Base, S.D., on March 25, 2009. Dynamic entries are used for high-risk incidents that could require the use of armed force. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 297100-Q-AVL75-968.jpg Photo Gallery