The Manhattan Project built three secret cities. One of them, in Tennessee, ran the huge plants that separated uranium-235 from natural uranium. Which city was it?

The reactors built along the Columbia River at Hanford, Washington produced the material for the Fat Man bomb. What material did they make?

Which physicist served as scientific director of the secret laboratory at Los Alamos, where the bombs were designed and assembled?

An Army Corps of Engineers officer who had just overseen construction of the Pentagon was put in charge of the entire atomic program in September 1942. Who was he?

On July 16, 1945 the first atomic device was fired at a bombing range in the New Mexico desert. What was that test called?

The bomb used on Hiroshima had a gun-type design that fired one piece of uranium-235 into another, and it was never tested beforehand. The July 1945 Trinity test used the other design, plutonium implosion.

The B-29s that carried the atomic bombs to Japan flew from an airfield in the Mariana Islands, home of the 509th Composite Group. From which island did they fly?

In May 1945 Secretary of War Henry Stimson formed a secret group of officials and scientists to advise President Truman on how the new weapon should be handled. What was that group called?

The Potsdam Declaration of July 26, 1945 demanded the unconditional surrender of Japan's armed forces. Which three governments issued it?

A target list drawn up in May 1945 put one city at the top, but the Secretary of War struck it off because of its standing as Japan's ancient cultural capital. Which city did he remove from the list?

In June 1945 a committee of Manhattan Project scientists at the Chicago laboratory sent Washington a report proposing an alternative to a surprise attack on a city. What did it recommend?

Which three leaders opened the Potsdam Conference on July 17, 1945, with the British one replaced partway through after his party lost a general election?

Vice President Truman knew nothing of the atomic program until he became president in April 1945. Which cabinet officer briefed him on it that month?

In 1939 two physicists warned President Roosevelt that uranium chain reactions might yield extremely powerful bombs and that Germany had stopped uranium sales from mines it controlled. What did Roosevelt do in response?

On December 2, 1942, under the stands of a football stadium in Chicago, Enrico Fermi's team ran a pile of graphite and uranium that sustained its own chain reaction. What did that result make possible?

The Trinity test succeeded on July 16, 1945, one day before the Potsdam Conference opened, and word of the result reached the president while he was there. What did that timing mean for him at the conference?

The Potsdam Declaration promised Japan 'prompt and utter destruction' if it did not surrender unconditionally. Japan's government did not accept its terms. What followed?

Through the summer of 1945 Japanese leaders still hoped the Soviet Union, then neutral in the Pacific war, might help them get better terms. What ended that hope in August 1945?

Put these four events in the order they happened: the emperor's radio broadcast; the bombing of Hiroshima; the signing on the USS Missouri; the Soviet declaration of war on Japan.

A second atomic bomb, dropped on August 9, 1945, killed an estimated 74,000 people there by the end of that year. Its crew turned to this city only after cloud and smoke hid the primary target, Kokura. Which city was bombed?

About 140,000 people in Hiroshima had died by the end of 1945 from the bomb dropped at 8:15 in the morning of August 6. Which B-29 dropped it?

Emperor Hirohito's radio broadcast telling the Japanese people their government had accepted the Allied terms came before the second atomic bomb was dropped.

Japan's formal surrender was signed on September 2, 1945 aboard the USS Missouri in Tokyo Bay. Who signed for the Allied Powers?

What happened to Japan in the years right after the surrender?

After the war Congress debated whether atomic energy should stay in military hands. Which 1946 law settled it by placing atomic energy under a civilian commission?