A Navy MH53 helicopter places a barrier down to strengthen the broken dam, Oct. 5, 2017 at Guajataca Dam, Isabela, Puerto Rico. The Department of Defense is conducting on-going missions to rebuild and assist the citizens of Puerto Rico. (U.S. Army photo by: Pfc. Deomontez Duncan)

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Photo by: Pvt. Deomontez Duncan |  VIRIN: 171005-A-PL947-255.JPG