The first nuclear test, codenamed Trinity, was scheduled for July 16, 1945.

The Trinity test of July 16, 1945.

Requests for further postponements had to be refused because they would have affected the schedule for the main test.

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The 100-ton test went off at 04:37 Mountain War Time (MWT), on May 7, 1945.

The explosion also seemed to arouse little comment in neighboring towns.

The radioactive tracer, though not highly dangerous, was not something in which one wanted to get soaked!

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Whereupon, he dropped his rifle and started moving so that his helmet flew off.

He couldn’t have reached the ground much faster by jumping.

When I last saw him, he appeared to be trying to set a running speed record!

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Wire communications had become overloaded during the test, so more telephone lines were laid and radios were procured.

The rehearsal shot had gone off 1/4 second early due to electrical pick-up.

The 100-ton shakedown test gave the team confidence to go ahead with the first atomic bomb test.

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On July 16, 1945, the Trinity test took place.