AVIANO AIR BASE, Italy — U.S. Air Force Staff Sgt. Christopher Castro, avionics specialist with the 510th Fighter Squadron, avionics specialist waits for a vial of blood to fill during a mass ou

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AVIANO AIR BASE, Italy — U.S. Air Force Staff Sgt. Christopher Castro, avionics specialist with the 510th Fighter Squadron, avionics specialist waits for a vial of blood to fill during a mass out-processing deployment line, April 12, at Aviano Air Base, Italy. Castro will be deploying to Southwest Asia. (U.S. Air Force photo by Air Force Staff Sgt. Nadine Y. Barclay)