1 dawn on July 6,1945,the atomic bomb was set off. Observers agreed that they 2 -|||-(witness)something unlike anything ever seen 3 men before:a huge, colourful fireball,-|||-more brilliant than the sun,flashing as it rose for miles into the air. N 4 before had men-|||-released so much power at one time, 5 had any nation ever possessed a weapon 6 terrible-|||-and destructive as the atomic bomb.-|||-For several weeks,the test was 7 secret. When an atomic bomb was dropped from an-|||-American plane on Hiroshima, Japan,newspape and radio stations all 8 America told of the-|||-explosion of the bomb in New Mexico,Almost everybody was amazed to learn 9 the bomb-|||-had been made and tested-the desert of the Southwest had hidden the secret well.-|||-When news of the atomic bomb and 10 destmetivenss was amounce people around-|||-the world wondered 11 other new weapons were being prepared in the New Mexico desert.-|||-Some people doubted that the secret of making atomic bombs could be kept 12 other-|||-countries. 13 even doubted the 14 (wise)of using so powerful a weapon. 15 no-|||-one doubted that a new kind of war-and a new kind of world-had begun at Alamogordo,one-|||-summer morning in 1945.