Hammack added, "They are ideal for charging up batteries, making sure your (communications), night vision goggles and computers are powered up."

Hammack还补充说，“它们很适于充电电池，确保为你们(的通讯设备)、夜视仪和计算机提供能源。”

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Editor's Note: This blog introduces readers to Katherine Hammack, Assistant Secretary of the Army for Installations, Energy and Environment.

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Although the single-line method may be faster, Mr. Hammack says customers generally prefer to "jockey for position" in separate lines.

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Bill Hammack is preparing layoffs at his road-construction company in Georgia.

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