A Black Hawk helicopter crewed by Soldiers of the Pennsylvania Army National Guard's Company A, 2nd Battalion, 104th Aviation Regiment makes a difficult dust landing during training with the 166th Aviation Brigade at Fort Bliss, Texas, Jan. 7. The Pennsylvania Soldiers are undergoing rigorous training prior to their deployment to Afghanistan. Environmental training, or dust landings, is one of the more challenging portions of training, because the more sand that engulfs a helicopter, the more difficult the landing becomes. The goal is to land the aircraft and take off as quickly and seamlessly as possible. The 166th Aviation Brigade trains Army National Guard and Army Reserve aviation units for 48 days, then either certifies the units' preparedness for deployment or recommends additional training and preparation. (Photo by 1st Lt. Katherine Kaliski, 166th Aviation Brigade, Division West, Public Affairs)