If you visit the site of the Trinity test today, the circle of the bomb blast (about half a mile in diameter) is clearly visible. The bomb test annihilated the existing vegetation, along with every other living thing. When plant and animal life returned to the site many years later, it was yucca plants—rather than the surrounding creosote bushes—that filled in the space.
General Leslie Groves enjoyed a highly decorated military career. In addition to overseeing the Manhattan Project, he oversaw the construction of the Pentagon.
The laboratory at Los Alamos was so secret when it was built that even Vice President Harry Truman was unaware of its existence.