Spc. Cameron Powell, B Company, 1st Battalion, 126th Aviation Regiment, California National Guard, Task Force Shadow, a CH-47 Chinook helicopter mechanic, sweeps snow off the roof of a Chinook on the 101st Combat Aviation Brigade flight line, Bagram Air Field, Afghanistan, Jan. 12, 2013. (U.S. Army photo by Sgt. Duncan Brennan, 101st CAB public affairs)