[blam]

"Look at the first “ Littleboy “ test. It was first tested in Japan. We knew it would work from subcritical tests. But did not need to waste the small amount of Uranium we had at the time to prove it first in the US. The Uranium that was used in the subcritical tests. Was then made into the first U bomb and shipped to Japan."

On Monday morning July 16, 1945, the world was changed forever when the first atomic bomb was tested in an isolated area of the New Mexico desert. Conducted in the final month of World War II by the top-secret Manhattan Engineer District, this test was code named Trinity.

[Southack]

Absolutely, but we had two designs. One design was the gun type, and the other design was the implosion type. Trinity tested one, but the other was deemed 100% ready without a test, and so it was first "tested" live in Japan.

[quietolong]

What Southack said.
The Trinity test was the Fatman type.


Some good books to read on it:

“Genius “ The Life and Science of Richard Feynman
http://www.amazon.com/exec/obidos/tg/detail/-/0679747044/ref=lib_dp_TFCV/103-2440853-1363069?v=glance&s=books&vi=reader#reader-link

“Dark sun” Making of the H bomb
And
Making of the Atomic bomb
Richard Rhodes

Info on this thread
http://www.freerepublic.com/focus/news/622675/posts?page=52#52