Far away, on the northwest tip of Alaska, sits a remote, strategic military site nestled between a small mountain range and the unforgiving Chukchi Sea. Against this desolate backdrop, a few hours after midnight on Aug. 12, 2020, the U.S. Army Corps of Engineers – Alaska District oversaw the placement of the final rock in a mile-long seawall to cap off a monumental arctic engineering and construction effort at the Cape Lisburne Long Range Radar Site.