Sailors assigned to Naval Mobile Construction Battalion 1 (NMCB1) place concrete to construct a helicopter landing zone at Naval Base Guam, March 7, 2017. NMCB1 provides expeditionary construction and engineering support to expeditionary bases and responds to humanitarian assistance disaster relief(HADR) requests.

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Photo credit: © Chuck Little / Alamy / Afripics
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Keywords: battalion, construction, mobile, naval, seabee