欢迎来到VOA在线收网 www.voa365.com
当前位置:VOA NEWS > VOA慢速英语 > 建国史话 >

American History: Developing the First Atomic Bombs

2011-07-14 13:00来源:未知

Members of the experimental staff at North American Aviation, Inc. observing wind tunnel tests on a model of a B-25 plane in 1942
Members of the experimental staff at North American Aviation, Inc. observing wind tunnel tests on a model of a B-25 plane in 1942

STEVE EMBER: Welcome to THE MAKING OF A NATION – American history in VOA Special English. I’m Steve Ember

(MUSIC)

World War Two ended with an action that was never taken before in the history of warfare, and has never been taken since. It required the efforts of a team of scientists. Working in secrecy, they designed and built the first atomic bombs. President Harry S. Truman made the decision to use these weapons against Japan in August of nineteen forty-five.

PRESIDENT TRUMAN: "The world will note that the first atomic bomb was dropped on Hiroshima. We shall continue to use it until we destroy Japan’s power to make war."

STEVE EMBER: America's use of atomic weapons brought years of conflict in Europe and the Pacific to an end. But it also marked the beginning of the nuclear age. And it represented, in a dramatic way, the growing importance of science and technology in modern times.

 

The second atomic bomb ever used in warfare explodes over the Japanese town of Nagasaki on Aug. 9, 1945
The second atomic bomb ever used in warfare explodes over the Japanese town of Nagasaki on Aug. 9, 1945

Interest in science goes back to the earliest days of the nation. President Thomas Jefferson and Benjamin Franklin were famous not only as political leaders but also as inventors and scientists. President Abraham Lincoln and Congress established the National Academy of Sciences during the Civil War in the eighteen sixties. And in the early nineteen hundreds, the nation created scientific offices to study and improve agriculture, public health, even air travel.

(SOUND)

By the start of World War One in nineteen fourteen, the federal government was employing scientists in many areas of work.

President Woodrow Wilson created the National Research Council to organize the work of scientists and engineers to win the war. However, before World War Two, government support for science was generally limited. The government was willing to pay for research only to meet certain clear goals, such as better weapons or military transport systems.

(MUSIC)

World War Two greatly changed the traditionally limited relationship between American scientists and the federal government. In the early years of the war, the German forces of Adolf Hitler showed the world the strength of their new tanks, guns and other weapons.

President Franklin Roosevelt knew that the United States would need to develop modern weapons of its own if it entered the war.

For this reason, Roosevelt established a National Defense Research Committee in nineteen forty to support and organize research on weapons.

The new committee included some of the top scientists in America. Among its members were the presidents of Harvard University, the Massachusetts Institute of Technology and Bell Laboratories. The committee did its work so well that Roosevelt later formed an even more powerful Office of Scientific Research and Development.

The leader of both groups was Vannevar Bush -- no relation to the future presidents. He had long experience as a professor of electrical engineering and as an inventor. Many scientists knew him.

Vannevar Bush put together a hard-working team. And in the years that followed, American scientists and engineers developed one invention after another to help the war effort.

Scientists developed new devices to help the Navy find German submarines. They improved methods for bombers to find their targets. And they developed more powerful rockets to protect American troops when they landed on foreign beaches.

American scientists and doctors also made great progress in improving the methods of wartime medicine. World War Two may well have been the first war in history in which a wounded soldier was more likely to survive than to die.

(MUSIC)

But, in many ways, the most important scientific development of the period was the atomic bomb.

In nineteen thirty-nine, Albert Einstein wrote President Roosevelt a letter. The scientist told the president that it might soon be possible to build a powerful weapon -- a weapon that would use the power of the atom. And he urged Roosevelt to get American scientists to build the atomic bomb before German scientists could build one.

Roosevelt agreed. He created a special team of scientists. Their work became known as the Manhattan Project. Roosevelt made sure that these scientists got all the money and supplies they needed.

Roosevelt died before the scientists could complete their work. But in April nineteen forty-five, the scientists told the new president, Harry Truman, that they were almost ready to test their invention. Just three months later, they exploded the world's first atomic bomb in the desert in the southwestern state of New Mexico.

(SOUND)

Truman had to make a difficult decision. He knew the atomic bomb would cause widespread death and suffering if it was used on a Japanese city. But he was willing to do anything to avoid the need for American troops to invade Japan.

 

A "Little Boy" atom bomb. This was the kind of bomb used over Hiroshima on Aug. 6, 1945.
A "Little Boy" atom bomb. This was the kind of bomb used over Hiroshima on Aug. 6, 1945.

In Japan, a new prime minister and government were searching for a way to end the war. But Truman believed that the Japanese were still not ready to surrender. And he felt it was his duty to end the war as soon as possible.

On August sixth, nineteen forty-five, the first atomic bomb fell on the city of Hiroshima. Three days later, a second A-bomb fell on the city of Nagasaki.

PRESIDENT TRUMAN: "Having found the atomic bomb, we have used it.  We shall continue to use it until we completely destroy Japan’s power to make war. Only a Japanese surrender will stop us."

STEVE EMBER: President Truman

PRESIDENT TRUMAN: "It is an awful responsibility which has come to us. We thank God that it has come to us, instead of to our enemy. And we pray that he may guide us to use it in his ways and for his purposes."

STEVE EMBER: The Radiation Effects Research Foundation in Japan estimates that between one hundred fifty thousand and two hundred forty-six thousand people died within two to four months of the bombings.

The bombings left Japan's rulers with no choice. In less than one week, they surrendered.

 

President Truman during a news conference in the White House in Washington announcing the Japanese surrender
President Truman during a news conference in the White House in Washington announcing the Japanese surrender

PRESIDENT TRUMAN: "I received this afternoon a message from the Japanese government. I deem this reply a full acceptance of the Potsdam Declaration, which specifies the unconditional surrender of Japan.  In the reply there is no qualification.  Arrangements are now being made for the formal signing of the surrender terms at the earliest possible moment. General Douglas MacArthur has been appointed the Supreme Allied Commander to receive the Japanese surrender."

(MUSIC)

STEVE EMBER: In this newsreel, we hear General MacArthur accepting the surrender of the Japanese Empire.

NEWSREEL ANNOUNCER: "The Battleship Missouri, fifty-three thousand ton flagship of Admiral Halsey’s Third Fleet, becomes the scene of an unforgettable ceremony marking the complete and formal surrender of Japan.  General of the Army Douglas MacArthur, Supreme Allied Commander for the occupation of Japan, boards the Missouri.  Fleet Admiral Nimitz, Pacific Fleet Commander, and Admiral Halsey welcome MacArthur and his Chief of Staff General Sutherland aboard.  It is Sunday, September second, nineteen forty-five."

GENERAL MACARTHUR:" We are gathered here, representatives of the major warring powers, to conclude a solemn agreement whereby peace may be restored. The issues involving divergent ideals and ideologies have been determined on the battlefields of the world and hence are not for our discussion or debate. The terms and conditions upon which surrender of the Japanese Imperial Forces is here to be given and accepted are contained in the instrument of surrender now before you. I now invite the representatives of the Emperor of Japan and the Japanese Government and the Japanese Impreial Headquarters to sign the instrument of surrender at the places indicated.

(MUSIC)

STEVE EMBER: American scientists and engineers proved that a war could be won with research as well as bullets. And all Americans learned how much could be gained when government agencies, scientists and universities worked together for common goals.

Roosevelt had understood this long before the war ended. He asked Vannevar Bush to study how the federal government could work with scientists and universities in peacetime.

Bush offered a number of ideas to President Truman at the end of the war. He told the president that science was important to America's progress and safety. He called on the federal government to support scientific study and education.

Professor Bush said that the nation's universities should be greatly strengthened. He called for the creation of a new government agency to provide money for science projects.

Truman and Congress agreed with Vannevar Bush. And in the next few years, American research efforts expanded. In nineteen forty-six, the Office of Naval Research was created to support basic science study in universities. In the same year, the government created the Atomic Energy Commission. And in nineteen fifty, it created the National Science Foundation to provide support to thousands of the nation's best scientists.

In the years that followed, American science would grow beyond the wildest dreams of Vannevar Bush and other scientists of his time.

Universities would add thousands of new students along with new laboratories and research centers.

By the middle of the nineteen sixties, the federal government would spend more than thirteen billion a year for research and development. And five hundred new centers of higher learning would be created. All this investment would help make the United States the world leader in such fields as computer science, genetics and space travel.

Our program was written by David Jarmul. You can find our series online with transcripts, MP3s, podcasts and pictures at voaspecialenglish.com. You can also follow us on Facebook and Twitter at VOA Learning English. I’m Steve Ember, inviting you to join us again next week for THE MAKING OF A NATION -- American history in VOA Special English.

___

This was program #197. For earlier programs, type "Making of a Nation" in quotation marks in the search box at the top of the page.

(责任编辑:admin)
最新新闻
  1. 网传日月光Q4产能利用率降至70%
  2. 新型存储器已经开始增长,到20
  3. 市场人士透露:联发科在汽车芯片
  4. 【VOA在线闲聊】三星收购Arm会步英
  5. Nikola召回迄今为止生产的93辆Nik
  6. 蚂蚁数科两项区块链专利完成一对
  7. 蔚来申请注册“NIO CERTIFIED 蔚来官
  8. 获小米超千万投资 改装车公司工
  9. 法拉第未来首款电动汽车FF 91再次
  10. 消息称LG显示计划明年生产920万块
  11. 宝马面向欧洲市场推出最小的跨界
  12. 美国副总统哈里斯承诺就电动汽车
  13. 知情人士透露称马斯克和推特CE
  14. 因苹果缩减订单 台积电或修改明
  15. LG推出一项新技术,以开放局域网
  16. 小米13正式上线:骁龙8Gen2发布1
  17. 米家3 KG迷你洗衣机售价699元
  18. 苹果公司官方非常兴奋:印度将生
  19. 中国广电在全国31个省区开通广电
  20. 华为 Mate 50 Pro国外上市:售价远高
  21. 特斯拉柏林超级工厂回收工厂发生
  22. 华为 Mate 50原价4999
  23. iPhone 14销售比上一代下降了11%
  24. 2021至2025中国台湾将投350亿元新台
  25. 华为Mate50Pro预定5 G芯片,苹果公司
  26. 锐龙7000核显性能实测 单核及多核
  27. 索尼PS5最新更新:6 nm制程功率与
  28. 华为会议马上就要开始了!一种全
  29. 小米再次成为了冠军!该系列产品
  30. 还能吸收病毒?!戴森首个产品也
  31. 小米又推出了一款新产品,售价
  32. Imagination携手百度飞桨创建Model
  33. 奔驰要不要再加价?2024将发布
  34. TikTok在英国或被罚款2900万美元 被
  35. iPhone15PM改用 ULTRA:笔记本和 iPa
  36. 因库存不断提升存储芯片持续降价
  37. 预计小米Civi2将推出五款新产品
  38. 可靠商务桌面电脑推荐:联想M4
  39. 受飓风影响:NASA撤回阿尔忒弥斯
  40. 《三体》影迷们疯狂了!
  41. 4090设计实在是太离谱了!
  42. Meta试图Facebook和Instagram账户添加到
  43. 苹果公司在技术上遭受重大挫折,
  44. 我国成功发射遥感三十六号卫星,
  45. 骁龙8Gen2+120 W快速充电!小米13系
  46. 屏幕下手机价格大跌,灵动岛安卓
  47. 亚马逊宣布下月举办新会员促销活
  48. 酷睿i9-13900K预告片,5.8 GHz稳定!
  49. 美国流媒体巨头Netflix宣布在芬兰
  50. 外科手术机器人 商业化将加快世