<span>Sand dunes can encroach on human habitats. Sand dunes move through a few different means, all of them assisted by wind. One way that dunes can move is through saltation, where sand particles skip along the ground like a rock thrown across a pond might skip across the water's surface. When these skipping particles land, they may knock into other particles and cause them to skip as well. With slightly stronger winds, particles collide in mid-air, causing sheet flows. In a major dust storm, dunes may move tens of meters through such sheet flows. And like snow, sand avalanches, falling down the steep slopes of the dunes that face away from the winds, also moving the dunes forward.
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<span> face-to-face sessions among the Great Powers of </span>Austria<span>, </span>Britain<span>, </span>France<span>, </span>Russia<span>, and sometimes Prussia, with limited or no participation by other delegates.</span>
With the death of President Franklin D. Roosevelt on April 12, 1945, Vice President Harry S. Truman assumed the Oval Office. He surely knew he faced a difficult set of challenges in the immediate future: overseeing the final defeats of Germany and Japan; managing the U.S. role in post-war international relations; supervising the American economy's transition from a war-time to a peace-time footing; and maintaining the unity of a fractious and powerful Democratic Party.
The Iron Curtain !
now i just have to reach the word requirement
Answer:
the us had a policy of appeasement