The Roswell crash of 1947 was near the Trinity Test Site of the first explosion of an [[atomic bomb]] in July 1945. At the time of early tests, and usage in combat of atomic weapons, atmospheric contamination was unknown and only theorized or speculated. | The Roswell crash of 1947 was near the Trinity Test Site of the first explosion of an [[atomic bomb]] in July 1945. At the time of early tests, and usage in combat of atomic weapons, atmospheric contamination was unknown and only theorized or speculated. |