FORT HUACHUCA — The shadows of snow clouds steadily built and enveloped the Huachucas, but never quite managed to engulf hangar No. 3 at Libby Army Airfield late Monday afternoon. There was already enough precipitation flowing as the families, friends, a few pets, and comrades-in-arms gathered for two all-too-brief hours to say a goodbye with a kiss, hug or gentle touch that must last 15 months. “I gave him a present on his birthday,” said Chief Warrant Officer Ramona Hill, indicating little Wilson Hill, born on Oct. 25, held by his daddy with whom he will always share a birthday,...