ABOUT TRINITY SITE
Trinity Site, where
the first atomic bomb was tested at 5:29:45 a.m. Mountain War Time on July
16, 1945.
The 51,500 acre area was declared
a National Historic Landmark in 1975. The landmark includes base camp,
ground zero, and the McDonald ranch house where the plutonium core to the
bomb was assembled. Visitors to a Trinity site Open House see Ground Zero,
"Jumbo" bomb casing, the McDonald House, one of the old instrumentation
bunkers, historical photos, a Fatman bomb casing, and part of the original
crater left by the explosion revealing "Trinitite".
(Greenish colored glassy substance formed by the heat and pressure of the
explosion )