NEW CASTLE AIR NATIONAL GUARD, Del. - Lt. Col. Mark Heck, wing executive officer, 166th Airlift Wing, left, and Master Sgt. Michael Fernandez, base education and training manage, right, 166th Airlift Wing, clear mulch from sidewalk on April. 21, 2017 as part of a cleanup event held to commemorate Earth Day 2017.

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